Educational worksheet on human body systems featuring matching and multiple-choice questions.

Let's solve the worksheet step by step.

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I. Match the human body system to its function.

We need to match each body system (1–11) with the correct function (A–K).

#### 1. Skeletal system
→ A. A framework of bones that supports the body
✔ The skeletal system provides structure and support.

#### 2. Muscular system
→ E. Work with the skeletal system to allow the human body to move.
✔ Muscles contract to move bones, enabling movement.

#### 3. Respiratory system
→ B. Brings oxygen into the body and removes carbon dioxide
✔ Lungs take in O₂ and expel CO₂.

#### 4. Circulatory system
→ K. Circulates the blood throughout the body.
✔ Heart and blood vessels transport blood.

#### 5. Excretory system
→ H. Removes waste products from the human body.
✔ Kidneys, bladder, etc., remove metabolic wastes like urea.

#### 6. Nervous system
→ D. Control all the bodily functions
✔ Brain and nerves coordinate all body activities.

#### 7. Immune system
→ F. Provide protection against infections and diseases.
✔ White blood cells, antibodies fight pathogens.

#### 8. Integumentary system
→ G. Includes skin that protects the body from the outside world.
✔ Skin is the largest organ; acts as a barrier.

#### 9. Endocrine system
→ I. They produce hormones that help regulate conditions inside the body.
✔ Glands like thyroid, adrenal, pituitary release hormones.

#### 10. Reproductive system
→ C. Allows an organism to reproduce more of its own kind
✔ Produces gametes (sperm/egg) and enables reproduction.

#### 11. Digestive system
→ J. Transform food into forms that the body can use.
✔ Breaks down food into nutrients for absorption.

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✔ Matching Answers:

1. A
2. E
3. B
4. K
5. H
6. D
7. F
8. G
9. I
10. C
11. J

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II. Highlight your answer.

#### 1. What is the smallest unit of life in the human body?
A. tissue
B. organ
C. cell ✔
D. organ system

👉 Answer: C. cell
➡️ Cells are the basic building blocks of life.

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#### 2. Cells group together to form?
A. cell
B. organ
C. Tissue ✔
D. Organ system

👉 Answer: C. Tissue
➡️ Similar cells group to form tissues (e.g., muscle tissue).

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#### 3. Tissues are grouped together to form various?
A. cell
B. organ ✔
C. tissue
D. organ system

👉 Answer: B. organ
➡️ Different tissues combine to make organs (e.g., heart, liver).

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✔ Final Answers:

#### Part I: Matching
1. A
2. E
3. B
4. K
5. H
6. D
7. F
8. G
9. I
10. C
11. J

#### Part II: Multiple Choice
1. C. cell
2. C. Tissue
3. B. organ

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