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 tough, fibrous connective tissues that attach skeletal muscles to bones. They transmit the force generated by muscle contraction to the bones, enabling movement. The diagram on the worksheet clearly labels “Tendon” 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 (especially long bones like those in arms and legs) are surrounded and covered by layers of skeletal muscles. This helps protect the bones and allows for movement. While some bones (like skull or ribs) may not be fully “covered,” the general statement holds true for the majority of the skeleton — especially in the context of this elementary-level worksheet.

---

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 muscles in the human body:
- Skeletal muscle – voluntary, attached to bones.
- Smooth muscle – involuntary, found in organs (e.g., stomach, 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 can choose to move your arm, leg, 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 muscles (found in walls of internal organs like stomach, intestines, bladder) contract without conscious control — hence *involuntary*. Cardiac muscle is also involuntary, but since it’s not listed here, smooth is the correct choice among the options.

---

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

a. Yes
b. No

✔ Answer: a. Yes

🔹 Explanation:
Skeletal muscles often work in antagonistic pairs — one contracts (flexor) while the other relaxes (extensor). For example, when you bend your elbow, the biceps contract and the triceps relax; when you straighten it, the opposite happens. This pairing allows controlled, precise 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
*(Stomach walls contain smooth muscle to churn food)*

- b. Hands → i. Skeletal muscle
*(Muscles in hands are skeletal — you control finger movements voluntarily)*

- c. Heart → ii. Cardiac muscle
*(Heart has its own unique cardiac muscle that beats involuntarily)*

---

✔ 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! 🧠💪