Educational worksheet on the digestive system for students to learn about human digestion.

I'll solve this problem by matching the words from the word bank to the blanks in the text about the digestive system.

Let me first look at the word bank and then go through the text sentence by sentence to fill in the blanks with the appropriate terms.

The word bank contains:
1. fluids
2. energy
3. food
4. nutrients
5. saliva
6. chemical
7. stomach
8. waste
9. mouth
10. energy (duplicate)
11. fuel
12. intestine
13. absorption
14. cells
15. esophagus
16. sugars

Now I'll go through the text and match each blank with the most appropriate term:

1. "All living things need ___ the energy the body needs comes from the ___ it eats."
- First blank: "fuel" (as energy is derived from food, which serves as fuel)
- Second blank: "food"

2. "The parts of the body that help break down the food it eats and turn it into ___ for digesting food to ___ all of the ___ in the body."
- First blank: "nutrients" (food is broken down into nutrients)
- Second blank: "absorption" (the process of taking in nutrients)
- Third blank: "cells" (nutrients are absorbed for the cells)

3. "The digestive system is responsible for digesting food to ___ all of the ___ in the body."
- This seems to be a repeat of the previous concept, so likely "absorption" and "cells"

4. "Digesting takes two forms, mechanical and ___ ."
- Blank: "chemical" (mechanical and chemical digestion)

5. "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 ___ which is called chemical digestion."
- First blank: "stomach" (along with intestines, breaks down food chemically)
- Second blank: "sugars" (one form of breakdown product, though "nutrients" might also fit)

6. "First, the food is broken down by chewing and being softened by the ___ in the mouth."
- Blank: "saliva"

7. "From there, it is then swallowed by the ___ in the throat and passes through to the stomach."
- Blank: "esophagus"

8. "The stomach acid and gastric juices change the swallowed foods into ___ and turns it into nutrients that the body needs."
- Blank: "fluids" (stomach turns food into fluid mixture)

9. "After the stomach, the food then enters the small intestine where the nutrients are absorbed."
- This sentence doesn't have a blank.

10. "From the small intestine, the nutrients reach the blood stream by ___ where they nourish the cells in the body."
- Blank: "absorption" (this is how nutrients enter bloodstream)

11. "What is left over then travels to the large intestine where most of the water is removed from the food."
- This sentence doesn't have a blank.

12. "What remains is then turned into solid ___ to be taken to the rectum for excretion."
- Blank: "waste"

Based on my analysis, here's the completed answer:

1. fuel
2. food
3. nutrients
4. absorption
5. cells
6. chemical
7. stomach
8. sugars
9. saliva
10. esophagus
11. fluids
12. absorption
13. waste

Note: Some terms like "energy" and "intestine" from the word bank weren't used, while "absorption" appears twice in the text, which matches with the word bank having 16 terms but only 13 blanks to fill.