Ch. 35.1 human body systems ws Answers | PDF - Free Printable

Let’s go through the worksheet step by step.

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Section 35-1: Human Body Systems

Question 1: List the levels of organization in a multicellular organism, from smallest to largest.

We know that in biology, the levels go like this:

1. Cells – the basic unit of life
2. Tissues – groups of similar cells working together
3. Organs – made of different tissues working together
4. Organ systems – groups of organs that work together
5. Organism – the whole living thing

✔ So the correct order is:
Cells → Tissues → Organs → Organ systems

*(Note: The worksheet lists “a. Cells”, “b. Tissues”, “c. Organs”, “d. Organ systems” — so we just list them in that order.)*

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Question 2: Match each organ system with its function.

We’ll match each numbered organ system (1–12) with the correct lettered function (a–l).

Let’s go one by one:

1. Nervous system → Controls body movement, metabolism, and reproduction? Wait — actually, nervous system controls *voluntary* movement and sends signals. But looking at options:

- f. Controls growth, development, metabolism, and reproduction → That’s more endocrine + nervous combo, but typically nervous system is about fast control → Let’s check others.

Actually, let’s look for best matches:

- Nervous system → c. Coordinates the body’s response to changes in its internal and external environments ✔ (This is classic nervous system job — senses and reacts)

- Skeletal system → d. Provides structural support and protection for soft tissues ✔ (bones hold you up and protect organs)

- Integumentary system → e. Helps protect the body from disease ✔ (skin is your first barrier!)

- Endocrine system → f. Controls growth, development, metabolism, and reproduction ✔ (hormones do this)

- Lymphatic/immune system → i. Helps protect the body from disease ✔ (immune cells fight germs)

- Muscular system → a. Moves internal organs and provides a site for muscle-bone formation ✔ (muscles move things — including heart, stomach, and pull on bones)

- Reproductive system → k. Produces reproductive cells ✔ (sperm and eggs)

- Respiratory system → h. Brings oxygen into the body and removes carbon dioxide ✔ (lungs breathe)

- Circulatory system → b. Moves blood and other fluids through the body ✔ (heart and vessels)

- Digestive system → j. Breaks down food into small molecules that can be used by the body ✔ (stomach, intestines, etc.)

- Excretory system → g. Eliminates waste and maintains homeostasis ✔ (kidneys remove waste from blood)

- Wait — we have 12 systems and 12 functions. Let’s assign all:

Final matching:

1. Nervous system → c
2. Skeletal system → d
3. Integumentary system → e
4. Endocrine system → f
5. Lymphatic/immune system → i
6. Muscular system → a
7. Reproductive system → k
8. Respiratory system → h
9. Circulatory system → b
10. Digestive system → j
11. Excretory system → g
12. ??? Wait — we only have 11 listed? No, the worksheet says 1–12, but let’s count:

Actually, looking back:

The list is:

1. Nervous
2. Skeletal
3. Integumentary
4. Endocrine
5. Lymphatic/immune
6. Muscular
7. Reproductive
8. Respiratory
9. Circulatory
10. Digestive
11. Excretory
12. ??? Wait — no, it stops at 11? No, the image shows 12 items? Let me recheck.

Actually, in the original image, it’s numbered 1 to 12, but item 12 is missing? No — wait, the user’s image has:

Looking again:

The list is:

1. Nervous system
2. Skeletal system
3. Integumentary system
4. Endocrine system
5. Lymphatic/immune system
6. Muscular system
7. Reproductive system
8. Respiratory system
9. Circulatory system
10. Digestive system
11. Excretory system
12. ??? — Oh! In the image, item 12 is not labeled? Wait — no, actually, in the text provided, it goes up to 11? Let me recount the user’s input.

User’s text:

> 1. Nervous system
> 2. Skeletal system
> 3. Integumentary system
> 4. Endocrine system
> 5. Lymphatic/immune system
> 6. Muscular system
> 7. Reproductive system
> 8. Respiratory system
> 9. Circulatory system
> 10. Digestive system
> 11. Excretory system

That’s 11. But the worksheet says “Match each organ system...” and lists 1–12? Probably a typo in transcription. But in standard biology, there are 11 major systems sometimes grouped. However, since the worksheet likely expects 11 matches, and we have 11 functions (a–l is 12 letters? Wait — a to l is 12 letters.

Functions listed: a through l → 12 functions.

But only 11 systems listed? That doesn’t match.

Wait — looking back at user’s input:

> 1. Nervous system
> 2. Skeletal system
> 3. Integumentary system
> 4. Endocrine system
> 5. Lymphatic/immune system
> 6. Muscular system
> 7. Reproductive system
> 8. Respiratory system
> 9. Circulatory system
> 10. Digestive system
> 11. Excretory system

And functions:

a. Moves internal organs...
b. Moves blood...
c. Coordinates response...
d. Structural support...
e. Protects from disease
f. Controls growth...
g. Eliminates waste...
h. Brings oxygen...
i. Helps protect from disease
j. Breaks down food...
k. Produces reproductive cells
l. ??? — In user’s text, function l is: “Brings materials to cells, fights infection, and helps to regulate body temperature” — that’s circulatory? But we already assigned circulatory to b.

Wait — function l: “Brings materials to cells, fights infection, and helps to regulate body temperature” — that’s actually circulatory system too? But we have two circulatory-like functions?

This is confusing. Let me reassign carefully.

Standard matching:

- Nervous → c (coordinates response)
- Skeletal → d (structural support)
- Integumentary → e (protects from disease — skin)
- Endocrine → f (controls growth, etc.)
- Lymphatic/immune → i (helps protect from disease — immune part)
- Muscular → a (moves internal organs and provides site for muscle-bone formation)
- Reproductive → k (produces reproductive cells)
- Respiratory → h (brings oxygen in, removes CO2)
- Circulatory → b (moves blood and fluids) — BUT function l also says “brings materials to cells...” which is also circulatory. Hmm.

Actually, function l: “Brings materials to cells, fights infection, and helps to regulate body temperature” — this is still circulatory, but maybe they split it? Or perhaps it’s a mistake.

Alternatively, maybe “Lymphatic/immune” should take l? Because lymphatic does fight infection and help regulate temperature? But typically, circulatory does the bringing materials.

Let’s see: function b is “Moves blood and other fluids through the body” — that’s circulatory.

Function l: “Brings materials to cells, fights infection, and helps to regulate body temperature” — this is also circulatory, but perhaps they mean the immune aspect? But lymphatic is separate.

I think there might be an error in the worksheet or transcription. But based on standard knowledge:

We’ll assign:

1. Nervous → c
2. Skeletal → d
3. Integumentary → e
4. Endocrine → f
5. Lymphatic/immune → i (helps protect from disease)
6. Muscular → a
7. Reproductive → k
8. Respiratory → h
9. Circulatory → b (moves blood)
10. Digestive → j
11. Excretory → g
12. ??? — There is no 12th system listed. Perhaps the worksheet has 11, and function l is extra? Or maybe “Circulatory” should take l instead of b?

Function b: “Moves blood and other fluids through the body” — that’s definitely circulatory.

Function l: “Brings materials to cells, fights infection, and helps to regulate body temperature” — this is also circulatory, but perhaps they want circulatory to take l, and b is for something else? But nothing else fits b.

Another possibility: “Lymphatic/immune” might take l, because lymphatic system fights infection and helps regulate temperature? But typically, circulatory brings materials.

I think the intended matching is:

- Circulatory → l (brings materials to cells, etc.)
- And b might be for something else? But no other system fits b.

Let’s look at function b: “Moves blood and other fluids through the body” — that’s circulatory.

Function l: “Brings materials to cells, fights infection, and helps to regulate body temperature” — this is also circulatory, but perhaps they mean the delivery part.

To resolve, I recall that in some curricula, the circulatory system is matched with “transports materials”, and lymphatic with “fights infection”.

So:

- Circulatory → b (moves blood)
- Lymphatic/immune → l (fights infection, regulates temperature) — but function l says “brings materials to cells” which is not lymphatic.

This is messy. Perhaps the worksheet has a typo.

Given that, I’ll go with the most logical:

1. Nervous → c
2. Skeletal → d
3. Integumentary → e
4. Endocrine → f
5. Lymphatic/immune → i (helps protect from disease)
6. Muscular → a
7. Reproductive → k
8. Respiratory → h
9. Circulatory → b (moves blood)
10. Digestive → j
11. Excretory → g
12. — not present, so perhaps function l is unused or for another system.

But the worksheet likely expects 11 matches, and function l might be for circulatory, replacing b? Let's see what function b is: “Moves blood and other fluids through the body” — that’s circulatory.

Function l: “Brings materials to cells, fights infection, and helps to regulate body temperature” — this is also circulatory, but perhaps they want circulatory to take l, and b is for something else? No.

I think the best is to assign circulatory to l, because "brings materials to cells" is a key function, and "fights infection" might be a stretch, but lymphatic is separate.

Alternatively, perhaps "Lymphatic/immune" should take l, and circulatory takes b.

Let's check online or standard matching.

Upon second thought, in many textbooks:

- Circulatory system: transports oxygen, nutrients, hormones, etc. to cells; removes waste; helps regulate temperature.
- Lymphatic system: returns fluid to blood, absorbs fats, fights infection.

So function l: “Brings materials to cells, fights infection, and helps to regulate body temperature” — this is primarily circulatory, but "fights infection" is more lymphatic.

This is ambiguous.

For the sake of this exercise, I'll use:

9. Circulatory system → l (because it brings materials to cells and regulates temperature; fighting infection is secondary)
5. Lymphatic/immune system → i (helps protect from disease)

And function b: “Moves blood and other fluids through the body” — this is also circulatory, but perhaps it's redundant.

Since the worksheet has 12 functions and 11 systems, maybe one function is extra.

But in the user's input, there are 11 systems and 12 functions (a to l).

Perhaps "Circulatory" is matched to b, and "Lymphatic" to l.

Let's do:

5. Lymphatic/immune → l (fights infection, regulates temperature) — even though "brings materials" is not accurate, but perhaps in context.

I think the intended answer is:

1. c
2. d
3. e
4. f
5. i
6. a
7. k
8. h
9. b
10. j
11. g
12. — not present, so function l is unused or for another.

But to complete, perhaps the 12th system is missing, or it's a mistake.

Given the constraints, I'll provide the matching as per standard knowledge, and for question 2, the answers are:

1-c, 2-d, 3-e, 4-f, 5-i, 6-a, 7-k, 8-h, 9-b, 10-j, 11-g

And function l is extra or for circulatory, but we have b for circulatory.

Perhaps function l is for circulatory, and b is for something else, but no.

I think it's safe to go with the above.

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Question 13: What are four types of tissues found in the human body?

The four types are:

1. Epithelial tissue – covers body surfaces, lines cavities
2. Connective tissue – supports and connects other tissues (bone, blood, fat)
3. Muscle tissue – contracts to produce movement
4. Nervous tissue – conducts electrical impulses

✔ So the answer is: epithelial, connective, muscle, nervous

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Question 14: The eye is an example of a (an) ________.

Options:
a. nerve
b. organ
c. connective
d. muscle

The eye is made of many tissues (nervous, connective, muscle, epithelial) working together to perform a specific function (vision). So it is an organ.

✔ Answer: b. organ

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Question 15: Circle the letter of the type of tissue that covers interior and exterior body surfaces.

Options:
a. connective
b. epithelial
c. muscle
d. nerve

Epithelial tissue covers body surfaces (skin is epithelial), and lines internal cavities and organs.

✔ Answer: b. epithelial

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Now, compiling all answers:

Question 1:
Cells, Tissues, Organs, Organ systems

Question 2:
1-c, 2-d, 3-e, 4-f, 5-i, 6-a, 7-k, 8-h, 9-b, 10-j, 11-g
*(Note: Function l is not matched, as there are only 11 systems listed. If the worksheet has 12, please clarify, but based on input, this is it.)*

Question 13:
epithelial, connective, muscle, nervous

Question 14:
b. organ

Question 15:
b. epithelial

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Final Answer:

1. Cells, Tissues, Organs, Organ systems
2. 1-c, 2-d, 3-e, 4-f, 5-i, 6-a, 7-k, 8-h, 9-b, 10-j, 11-g
13. epithelial, connective, muscle, nervous
14. b
15. b