Educational worksheet on the digestive system with interactive fill-in-the-blank activity.

Let’s go step by step to fill in the blanks using the word bank. We’ll match each blank with the correct word from the list, and write down the number that goes with it.

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Blank 1: “All living things need ______, the energy the body needs comes from the ______ it eats.”

- First blank: Living things need energy → that’s #10
- Second blank: Energy comes from the food they eat → but “food” isn’t in the word bank. Wait — look again. The sentence says “comes from the ______ it eats.” What do we eat? Food — but since “food” isn’t listed, maybe it’s referring to what food gives us? Actually, rereading: “the energy the body needs comes from the ______ it eats.” That must be food, but since “food” isn’t an option, perhaps it’s a trick? Wait — no, let’s check the word bank again.

Word bank:
1. fluids
2. nourish
3. food ← YES! It’s there! I missed it at first.
4. nutrients
5. saliva
6. chemical
7. stomach
8. waste
9. mouth
10. energy
11. fuel
12. intestine
13. absorption
14. cells
15. esophagus
16. sugars

So yes — “food” is #3.

→ Blank 1: energy (#10)
→ Blank 2: food (#3)

Wait — actually, the sentence is:
“All living things need ______, the energy the body needs comes from the ______ it eats.”

That means: All living things need energy (blank 1), and that energy comes from the food (blank 2) it eats.

✔ So:
Blank 1 = 10 (energy)
Blank 2 = 3 (food)

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Blank 3: “The parts of the body that help break down the food it eats and turn it into ______ are called the digestive system.”

What does food get turned into? Nutrients! → #4

✔ Blank 3 = 4 (nutrients)

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Blank 4: “The digestive system is responsible for digesting food to ______ all of the ______ in the body.”

First part: “digesting food to ______” — what’s the purpose? To nourish the body → #2
Second part: “all of the ______ in the body” — probably cells → #14

✔ Blank 4 = 2 (nourish)
✔ Blank 5 = 14 (cells)

Wait — let’s read carefully:
“digesting food to ______ all of the ______ in the body.”

Yes — nourish the cells.

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Blank 6: “Digesting takes two forms, mechanical digestion and ______.”

Mechanical and chemical digestion → #6

✔ Blank 6 = 6 (chemical)

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Blank 7: “Your mouth does the chewing which is referred to as mechanical digestion and your ______ and intestines break the food down using chemicals turning it into ______; that is called chemical digestion.”

First blank: After mouth, what breaks down food chemically? Stomach and intestines → so here it’s “your ______ and intestines” → likely stomach → #7
Second blank: Turning food into what? Nutrients → but we already used #4. Wait — or maybe sugars? But sugars are just one type. Let’s see context: “turning it into ______; that is called chemical digestion.” Chemical digestion turns food into smaller molecules like nutrients — but “nutrients” was already used. Maybe it’s fuel? Or sugars?

Wait — later it says: “gastric juices change the swallowed foods into ______ and turns it into nutrients” — oh! So here, before nutrients, it might be something else.

Actually, let’s skip ahead and come back.

But logically: mouth (mechanical), then stomach and intestines (chemical). So blank 7a = stomach (#7)

Then: “turning it into ______” — what? In chemical digestion, food is broken into absorbable units — often called nutrients, but if we can’t reuse, maybe sugars? But not all food becomes sugar. Hmm.

Wait — looking at the next sentence: “First, the food is broken down by chewing and being softened by the ______ in the mouth.” → that’s saliva → #5

So let’s do that one first.

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Blank 8: “softened by the ______ in the mouth” → saliva → #5

✔ Blank 8 = 5 (saliva)

Back to previous: “your ______ and intestines break the food down using chemicals turning it into ______”

We have “stomach” for the first part → #7

For the second part: turning into what? Later it says “change the swallowed foods into ______ and turns it into nutrients” — so maybe here it’s fluids? Or waste? No.

Actually, in many texts, chemical digestion turns food into nutrients — but since “nutrients” is #4 and we may need it again? The instructions don’t say we can’t reuse numbers. Let me check the problem.

It says: “Write the number that corresponds to the word in the blanks provided.” It doesn’t say each number is used once. So maybe we can reuse?

But typically in these worksheets, each word is used once. Let’s count the blanks.

Let’s list all blanks:

From text:

1. need ______ → energy (#10)
2. from the ______ it eats → food (#3)
3. turn it into ______ → nutrients (#4)
4. to ______ all of the ______ → nourish (#2), cells (#14) → that’s two blanks
5. mechanical digestion and ______ → chemical (#6)
6. your ______ and intestines → stomach (#7)
7. turning it into ______ → ?
8. softened by the ______ → saliva (#5)
9. swallowed by the ______ → esophagus (#15)
10. passes through to the ______ → stomach? But we already used stomach? Wait, no — “passes through to the stomach” — but earlier we said stomach is for breaking down. Let’s read:

“From there, it is then swallowed by the ______ in the throat and passes through to the ______. The stomach acid...”

Ah! So: swallowed by the esophagus (#15), then passes to the stomach (#7) — but we already used stomach for the other blank? Conflict.

Let’s map all blanks in order as they appear in the text.

I’ll number the blanks sequentially as they appear in the paragraph.

Text with blanks marked [1], [2], etc.:

"All living things need [1], the energy the body needs comes from the [2] it eats. The parts of the body that help break down the food it eats and turn it into [3] are called the digestive system. The digestive system is responsible for digesting food to [4] all of the [5] in the body. Digesting takes two forms, mechanical digestion and [6]. Your mouth does the chewing which is referred to as mechanical digestion and your [7] and intestines break the food down using chemicals turning it into [8]; that is called chemical digestion. First, the food is broken down by chewing and being softened by the [9] in the mouth. From there, it is then swallowed by the [10] in the throat and passes through to the [11]. The stomach acid and gastric juices change the swallowed foods into [12] and turns it into nutrients and that the body needs. After the stomach, the food then enters the small [13] where the nutrients are absorbed. From the small intestine, the nutrients reach the blood stream by [14] where they nourish the cells in the body. What is left over then travels to the large intestine where most of the water is removed from the food. What remains is then turned into solid [15] to be taken to the rectum for excretion."

Now, word bank has 16 words, and we have 15 blanks? Let's count:

Blanks 1 to 15 — yes, 15 blanks.

Word bank has 16 items — so one word won't be used.

Now let's assign:

[1] need ______ → energy → #10
[2] from the ______ it eats → food → #3
[3] turn it into ______ → nutrients → #4
[4] to ______ all of the → nourish → #2
[5] all of the ______ → cells → #14
[6] mechanical and ______ → chemical → #6
[7] your ______ and intestines → stomach → #7
[8] turning it into ______ → ? What is produced by chemical digestion before nutrients? Often "simple sugars" or "molecules", but in word bank: sugars (#16), or fuels (#11)?
Later it says: "change the swallowed foods into [12] and turns it into nutrients" — so [12] might be something else.

Perhaps [8] is "fluids"? Unlikely.

Another thought: in some contexts, chemical digestion turns food into "chyme" but that's not in word bank.

Let's look at [12]: "change the swallowed foods into [12] and turns it into nutrients"

This suggests [12] is an intermediate form. In biology, stomach turns food into chyme, but not in word bank. Perhaps "waste"? No.

Maybe "fuels"? Or "sugars"?

Let's continue with easier ones.

[9] softened by the ______ in the mouth → saliva → #5
[10] swallowed by the ______ in the throat → esophagus → #15
[11] passes through to the ______ → stomach → but we already used #7 for [7]? Problem.

If [7] is "stomach", then [11] can't also be stomach. But the text says: "your [7] and intestines" — that should be stomach, because stomach and intestines are organs that do chemical digestion.

Then later: "passes through to the [11]" — after esophagus, it goes to stomach. So [11] should be stomach.

Conflict — same word used twice? But word bank has only one "stomach".

Unless I misassigned [7].

Let's read: "Your mouth does the chewing... and your [7] and intestines break the food down using chemicals"

The organs that do chemical digestion are stomach and intestines. So [7] must be stomach.

Then: "swallowed by the [10] in the throat and passes through to the [11]" — [10] is esophagus, [11] is stomach.

So both [7] and [11] would be stomach — but we can't use #7 twice if each word is used once.

Perhaps the worksheet allows reuse? But typically not.

Another possibility: maybe [7] is not stomach. What else? "Gastric" is not in word bank. Or "acid"? No.

Let's look at the word bank again. Is there another organ? Intestine is #12, but it says "your [7] and intestines", so [7] is separate from intestines.

Perhaps it's "mouth"? But mouth is already mentioned for mechanical.

I think there's a mistake in my approach.

Let me search online or recall standard digestive system fill-in-the-blank.

Standard sequence:

- Mouth: mechanical digestion, saliva
- Esophagus: swallows food
- Stomach: chemical digestion with acid
- Small intestine: absorption
- Large intestine: water removal, waste formation

In the text: "your [7] and intestines break the food down using chemicals" — this likely refers to stomach and intestines together doing chemical digestion.

Then later: "passes through to the [11]" — which is stomach.

So perhaps [7] is meant to be "stomach", and [11] is also "stomach", but since the word bank has only one "stomach", maybe the worksheet expects us to use it once, and for [7] it's something else.

Another idea: perhaps [7] is "gastric" but not in word bank.

Let's list all words and see which are left.

Perhaps for [8]: "turning it into ______" — in chemical digestion, food is turned into "nutrients", but we have [3] as nutrients already. Or "sugars" for carbohydrates.

But let's look at [12]: "change the swallowed foods into [12] and turns it into nutrients"

This suggests [12] is not nutrients, but something else. In stomach, food is mixed with acid to form chyme, but not in word bank. Perhaps "fluids"? #1

Or "waste"? No.

Another thought: in some simplified versions, they say food is turned into "fuel" or "energy", but energy is already used.

Let's try to assign what we know for sure.

Known assignments:

[1] energy - #10
[2] food - #3
[3] nutrients - #4
[4] nourish - #2
[5] cells - #14
[6] chemical - #6
[9] saliva - #5
[10] esophagus - #15
[13] small [13] -> intestine - #12 (since "small intestine")
[14] by [14] -> absorption - #13
[15] solid [15] -> waste - #8

Now, [7]: your [7] and intestines — must be stomach - #7
[11]: passes through to the [11] — after esophagus, to stomach — so also #7? But can't use twice.

Unless the worksheet has a typo, or perhaps [11] is not stomach.

Read: "From there, it is then swallowed by the [10] in the throat and passes through to the [11]. The stomach acid and gastric juices..."

After "passes through to the [11]", it immediately says "The stomach acid", so [11] must be stomach, because the acid is in the stomach.

So [11] = stomach = #7

Then for [7]: "your [7] and intestines" — if [7] is also stomach, then it's redundant, but perhaps it's acceptable, or perhaps [7] is meant to be "gastric" but not available.

Another possibility: perhaps [7] is "mouth", but mouth is for mechanical, not chemical.

Let's look at the word bank: is there "organ" or something? No.

Perhaps "fluids" for [7]? Doesn't make sense.

Let's consider that "intestines" includes small and large, but the blank is "your [7] and intestines", so [7] is likely stomach.

Perhaps in this context, [7] is "stomach", and for [11] it's also "stomach", and we use #7 for both, even though it's the same number. But the instruction is to write the number, so if the same word is used twice, same number.

But typically in such worksheets, each blank gets a unique number, and words are used once.

Let's count how many blanks we have assigned uniquely.

Assigned so far:

[1] 10
[2] 3
[3] 4
[4] 2
[5] 14
[6] 6
[9] 5
[10] 15
[13] 12 (intestine)
[14] 13 (absorption)
[15] 8 (waste)

That's 11 blanks.

Remaining blanks: [7], [8], [11], [12]

And remaining words in word bank: let's list all 16 words and cross out used.

Used: 10,3,4,2,14,6,5,15,12,13,8

So used numbers: 2,3,4,5,6,8,10,12,13,14,15

Left: 1,7,9,11,16

Words left: 1.fluids, 7.stomach, 9.mouth, 11.fuel, 16.sugars

Blanks left: [7], [8], [11], [12]

[7]: your [7] and intestines — must be stomach — #7

[11]: passes through to the [11] — stomach — #7 again? But only one #7.

Unless [11] is not stomach. But the next sentence is "The stomach acid", so it must be stomach.

Perhaps [11] is "intestine", but it says "passes through to the [11]", and then "the stomach acid", so [11] should be stomach.

Another idea: perhaps "passes through to the [11]" and [11] is "stomach", but in the word bank, "stomach" is #7, and for [7] "your [7] and intestines", perhaps [7] is "mouth", but that doesn't make sense because mouth is for mechanical, and it says "break the food down using chemicals", which mouth doesn't do much of.

Saliva has amylase, which is chemical, but usually it's associated with mouth for mechanical, and stomach/intestines for chemical.

Let's read the sentence: "Your mouth does the chewing which is referred to as mechanical digestion and your [7] and intestines break the food down using chemicals"

So mouth = mechanical, [7] and intestines = chemical.

So [7] should be an organ that does chemical digestion besides intestines — that's stomach.

So [7] = stomach = #7

Then for [11]: "passes through to the [11]" — after esophagus, to stomach — so [11] = stomach = #7

So we have to use #7 for both [7] and [11]. Perhaps the worksheet allows that, or perhaps it's a flaw.

Maybe "intestines" in [7] refers to large intestine, and [7] is small intestine, but small intestine is later called "small [13]", and [13] is intestine #12.

This is messy.

Let's look at [8]: "turning it into [8]" — chemical digestion turns food into what? In many texts, "nutrients", but we have [3] as nutrients. Or "simple sugars" — #16 sugars.

Or "fuel" — #11.

Later, [12]: "change the swallowed foods into [12] and turns it into nutrients" — so [12] might be "chyme" but not in word bank, or "fluids" #1.

Perhaps [8] is "sugars" and [12] is "fluids" or something.

Another approach: let's assume that "stomach" is used for [11], and for [7] it's something else.

What if [7] is "gastric" but not in word bank.

Perhaps "acid" but not there.

Let's consider that "your [7] and intestines" might be "stomach and intestines", so [7] = stomach.

Then for [11], since it's "passes through to the [11]", and then "the stomach acid", perhaps [11] is not needed to be stomach, but the sentence is "passes through to the [11]. The stomach acid..." so [11] is the location where stomach acid is, so it must be stomach.

I think we have to accept that #7 is used for both [7] and [11], or perhaps the worksheet has a different intention.

Let's look at the last few.

[12]: "change the swallowed foods into [12] and turns it into nutrients"

In stomach, food is turned into chyme, which is a semi-fluid mass, so perhaps "fluids" #1.

Then [8]: "turning it into [8]" — for chemical digestion in general, it could be "nutrients", but already used, or "sugars" #16.

[14] is absorption, which is correct.

[15] waste, correct.

Now for [8]: in the sentence: "your [7] and intestines break the food down using chemicals turning it into [8]"

If [7] is stomach, and intestines, then turning into nutrients, but [3] is already nutrients.

Perhaps [8] is "fuel" #11, as in energy source.

Or "sugars" #16.

Let's see what makes sense.

Also, [12]: "change the swallowed foods into [12]" — in stomach, it's turned into a liquid mixture, so "fluids" #1.

Then "and turns it into nutrients" — so [12] is fluids, and then to nutrients.

For [8], when stomach and intestines break down food, they turn it into nutrients, but since [3] is already "turn it into nutrients", perhaps [8] is something else.

Perhaps [8] is "chemical" but already used.

I recall that in some curricula, they say chemical digestion turns food into "simple substances" or "molecules", but not in word bank.

Another idea: perhaps [8] is "waste", but that's later.

Let's try to assign the remaining words to the remaining blanks.

Remaining blanks: [7], [8], [11], [12]

Remaining words: 1.fluids, 7.stomach, 9.mouth, 11.fuel, 16.sugars

[7]: your [7] and intestines — must be stomach — #7

[11]: passes through to the [11] — stomach — #7 again? Or perhaps it's "intestine", but that doesn't fit.

Unless "passes through to the [11]" and [11] is "stomach", but we have to use #7 for it, and for [7] also #7.

Perhaps the worksheet intends for [7] to be "stomach", and for [11] to be "stomach", so same number.

For [8]: turning it into [8] — let's say "sugars" #16, as a product of digestion.

For [12]: change into [12] — "fluids" #1, as chyme is fluid.

Then what about "mouth" #9 and "fuel" #11? Not used.

[9] is already assigned to saliva, which is correct.

[9] is "softened by the [9] in the mouth" — saliva, #5, not mouth.

"Mouth" is #9 in word bank, but in the text, "in the mouth" is already stated, so [9] is the substance, saliva.

So "mouth" as a word might not be used, or for another blank.

Is there a blank for "mouth"? In the beginning, "your mouth does the chewing" — no blank there.

So perhaps "mouth" #9 is not used, and "fuel" #11 is not used.

For [8], if we put "sugars" #16, and for [12] "fluids" #1, then [7] and [11] both #7.

But let's see if there's a better way.

Another possibility: for [7], "your [7] and intestines" — perhaps [7] is "gastric" but not available, or "acid".

Perhaps "enzymes" but not in word bank.

Let's look at the word "nourish" — we have it for [4].

Perhaps for [8], "nutrients" but already used.

I think I found a solution.

In the sentence: "your [7] and intestines break the food down using chemicals turning it into [8]"

Perhaps [7] is "stomach" #7, and [8] is "nutrients" #4, but [3] is also "turn it into nutrients", so duplicate.

Unless the worksheet allows it.

Perhaps [3] is "energy" but no, [1] is energy.

Let's read the very first sentence: "All living things need [1], the energy the body needs comes from the [2] it eats."

[1] is "energy", [2] is "food".

Then "turn it into [3]" — from food to what? Nutrients.

So [3] = nutrients.

Then for [8], when breaking down, it's also to nutrients, so perhaps same.

But let's assume that for [8], it's "sugars" as a specific nutrient.

For [12]: "change the swallowed foods into [12]" — in stomach, it's turned into "chyme", which is a fluid, so "fluids" #1.

Then "and turns it into nutrients" — so [12] = fluids.

For [8]: "turning it into [8]" — for chemical digestion, it could be "fuel" #11, as in energy-rich molecules.

Or "sugars" #16.

Let's choose "sugars" for [8], as it's a common product.

Then for [11]: "passes through to the [11]" — must be stomach #7.

For [7]: "your [7] and intestines" — stomach #7.

So both [7] and [11] are #7.

Perhaps that's acceptable.

Maybe "intestines" in [7] is the small intestine, and [7] is large intestine, but large intestine is for water removal, not primarily for chemical digestion.

Chemical digestion is mainly in stomach and small intestine.

So I think it's stomach.

Perhaps the blank [7] is for "mouth", but that doesn't make sense.

Another idea: in some contexts, "gastric" is used, but not in word bank.

Let's check online or standard answer.

Since this is a common worksheet, I recall that in some versions, the blank for "your ______ and intestines" is "stomach", and for "passes through to the ______" is "stomach", so same word.

For the sake of completing, I'll assign:

[7] = 7 (stomach)
[8] = 16 (sugars) -- assuming chemical digestion produces sugars
[11] = 7 (stomach) -- same as above
[12] = 1 (fluids) -- as chyme is fluid

Then the unused words are "mouth" #9 and "fuel" #11.

"Fuel" might be for [8], but "sugars" is more specific.

"Fuel" could be for energy, but energy is already used.

Perhaps for [8], "fuel" #11.

Let's see the sentence: "turning it into [8]" — if it's "fuel", that could work, as food is turned into fuel for the body.

Then for [12], "fluids" #1.

And "sugars" #16 unused.

But "sugars" is a type of fuel, so perhaps "fuel" is better.

In the word bank, "fuel" is #11, "sugars" is #16.

In biology, digestion turns food into glucose (sugar) for energy, so "sugars" might be accurate.

But let's see the context.

Later, "nutrients reach the blood stream by absorption where they nourish the cells" — so nutrients include sugars, fats, proteins.

So perhaps [8] should be "nutrients", but already used.

I think the best is to use "sugars" for [8], as it's a direct product.

For [12], "fluids" for the semi-liquid state in stomach.

So final assignment:

[1] 10 (energy)
[2] 3 (food)
[3] 4 (nutrients)
[4] 2 (nourish)
[5] 14 (cells)
[6] 6 (chemical)
[7] 7 (stomach)
[8] 16 (sugars)
[9] 5 (saliva)
[10] 15 (esophagus)
[11] 7 (stomach) -- same as [7]
[12] 1 (fluids)
[13] 12 (intestine)
[14] 13 (absorption)
[15] 8 (waste)

Unused words: 9.mouth, 11.fuel

But "mouth" is mentioned in the text, but no blank for it, so ok.

"Fuel" not used.

Perhaps for [8], "fuel" is better than "sugars", since not all digestion produces sugars; fats and proteins are also digested.

So maybe [8] = 11 (fuel)

Then [12] = 1 (fluids)

And "sugars" unused.

Or perhaps [12] = 11 (fuel), but "change into fuel and turns it into nutrients" doesn't make sense.

The sentence is: "change the swallowed foods into [12] and turns it into nutrients"

So [12] is an intermediate, then to nutrients.

In stomach, food is turned into chyme (fluid), then in intestines to nutrients.

So [12] = fluids #1

For [8], "turning it into [8]" — for chemical digestion, it's into absorbable units, which are nutrients, but since [3] is already nutrients, perhaps it's "simple molecules" but not in word bank.

I think "sugars" is acceptable for [8], as a representative.

To match common answers, I recall that in some worksheets, for "turning it into ______" in chemical digestion, they use "nutrients", but here it's already used.

Perhaps the blank [3] is not "nutrients", but let's double-check.

"The parts of the body that help break down the food it eats and turn it into [3] are called the digestive system."

What does the digestive system turn food into? Nutrients, yes.

So [3] = nutrients.

Then for [8], it must be something else.

Another possibility: "energy" but already used.

I think I have to go with what makes sense.

Let's look for the answer online or think differently.

Perhaps for [7], "your [7] and intestines" — [7] is "gastric" but not, or "acid".

Notice that in the word bank, there is "saliva" for mouth, "stomach" for stomach, etc.

Perhaps "intestines" in [7] is the small intestine, and [7] is the large intestine, but large intestine doesn't do chemical digestion; it absorbs water.

Chemical digestion is completed in small intestine.

So still, stomach is key.

I found a similar worksheet online in my memory: usually, "your stomach and intestines" for chemical digestion.

And "passes through to the stomach" .

So for this, I'll use #7 for both [7] and [11].

For [8], let's use "nutrients" even though used, or "sugars".

To avoid duplication, perhaps [8] is "chemical" but already used for [6].

I think the intended answer for [8] is "nutrients", and for [3] also "nutrients", so same number.

But the word bank has only one "nutrients", so probably not.

Perhaps [3] is "energy", but no, [1] is energy.

Let's calculate the number of times each word is used.

Perhaps "food" is used for [2], and for [3] "nutrients", then for [8] "sugars", for [12] "fluids", etc.

I think I'll go with:

[8] = 16 (sugars)
[12] = 1 (fluids)
[7] = 7 (stomach)
[11] = 7 (stomach)

And accept that #7 is used twice.

For the final answer, I'll list the numbers in order.

So the sequence of blanks 1 to 15:

1: 10
2: 3
3: 4
4: 2
5: 14
6: 6
7: 7
8: 16
9: 5
10: 15
11: 7
12: 1
13: 12
14: 13
15: 8

Now, to confirm, let's write the filled text:

"All living things need energy, the energy the body needs comes from the food it eats. The parts of the body that help break down the food it eats and turn it into nutrients are called the digestive system. The digestive system is responsible for digesting food to nourish all of the cells in the body. Digesting takes two forms, mechanical digestion and chemical. Your mouth does the chewing which is referred to as mechanical digestion and your stomach and intestines break the food down using chemicals turning it into sugars; that is called chemical digestion. First, the food is broken down by chewing and being softened by the saliva in the mouth. From there, it is then swallowed by the esophagus in the throat and passes through to the stomach. The stomach acid and gastric juices change the swallowed foods into fluids and turns it into nutrients and that the body needs. After the stomach, the food then enters the small intestine where the nutrients are absorbed. From the small intestine, the nutrients reach the blood stream by absorption where they nourish the cells in the body. What is left over then travels to the large intestine where most of the water is removed from the food. What remains is then turned into solid waste to be taken to the rectum for excretion."

This makes sense, even though "stomach" is used twice, and "sugars" and "fluids" are a bit forced, but acceptable for elementary level.

"Fluids" for chyme is reasonable, and "sugars" for the product of digestion.

So I'll go with that.

Final Answer:
10, 3, 4, 2, 14, 6, 7, 16, 5, 15, 7, 1, 12, 13, 8