Muscular system worksheet for Grade 5 - Free Printable

Here is the complete solution to the “Worksheet - Muscular System” with explanations for each answer:

---

1. Muscles are attached to bones through ______________.

✔ Answer: Tendons

Explanation:
Tendons are strong, fibrous connective tissues that connect muscles to bones. When a muscle contracts, it pulls on the tendon, which then moves the bone. This is clearly shown in the diagram on the worksheet — the label “Tendon” points to the structure connecting the muscle to the bone.

---

2. Bones are covered by muscles

a. Yes
b. No

✔ Answer: a. Yes

Explanation:
Most bones in the body are covered (at least partially) by skeletal muscles. For example, your femur (thigh bone) is surrounded by quadriceps and hamstrings; your humerus is covered by biceps and triceps. While some bones (like those in the skull or fingers) may have less muscle coverage, overall, the statement is true — muscles cover bones to allow movement and provide protection.

---

3. How many types of muscles are there in our body?

a. Four
b. Three

✔ Answer: b. Three

Explanation:
There are three main types of muscle tissue in the human body:
- Skeletal muscle – voluntary, attached to bones.
- Smooth muscle – involuntary, found in organs like stomach and intestines.
- Cardiac muscle – involuntary, found only in the heart.

---

4. Which of the following is a voluntary muscle?

a. Smooth
b. Skeletal

✔ Answer: b. Skeletal

Explanation:
Skeletal muscles are under conscious control — you decide when to move your arms, legs, or face. That’s why they’re called *voluntary*. Smooth and cardiac muscles work automatically (involuntarily).

---

5. Which of the following is an involuntary muscle?

a. Skeletal
b. Smooth

✔ Answer: b. Smooth

Explanation:
Smooth muscle is found in internal organs (like the stomach, intestines, and blood vessels) and functions without conscious control — you don’t think about digesting food or constricting blood vessels. So it’s *involuntary*. Cardiac muscle is also involuntary, but since it’s not listed here, smooth is the correct choice.

---

6. Muscles of the body work in pairs for the movement of our body

a. Yes
b. No

✔ Answer: a. Yes

Explanation:
Many skeletal muscles work in antagonistic pairs — one muscle contracts to move a bone in one direction, while its opposing partner relaxes; then the opposite happens to return to the original position. Example: Biceps flex the arm, triceps extend it. So yes, they often work in pairs for coordinated movement.

---

7. Match of the following

a. Stomach → iii. Smooth muscle
b. Hands → i. Skeletal muscle
c. Heart → ii. Cardiac muscle

✔ Answer:

- a. Stomach — iii. Smooth muscle
→ The stomach wall contains smooth muscle to churn and mix food during digestion — this is involuntary.

- b. Hands — i. Skeletal muscle
→ The muscles in your hands (and forearms) are skeletal muscles that you consciously control to grasp, write, or wave.

- c. Heart — ii. Cardiac muscle
→ Only the heart has cardiac muscle — it’s specialized, involuntary, and constantly pumps blood.

---

✔ Final Answer Key:

1. Tendons
2. a. Yes
3. b. Three
4. b. Skeletal
5. b. Smooth
6. a. Yes
7. a–iii, b–i, c–ii

Let me know if you’d like a printable version or flashcards for review!