Educational worksheet on the muscular system featuring questions and a full-body muscle diagram.

Let's solve each question in the Muscular System Worksheet step by step and provide explanations.

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1. There are around _________ skeletal muscles in the human body.

✔ Answer: 600

🔍 Explanation: The human body has approximately 600 skeletal muscles. These are the muscles attached to bones and responsible for voluntary movements like walking, running, and lifting.

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2. There are 3 types of muscle: _________________________.

✔ Answer: Skeletal, smooth, and cardiac

🔍 Explanation:
- Skeletal muscles – Attached to bones; responsible for voluntary movement.
- Smooth muscles – Found in internal organs (like stomach and blood vessels); work involuntarily.
- Cardiac muscle – Found only in the heart; also involuntary but unique in structure and function.

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3. _______________ is a disorder that affects balance and motor functions.

✔ Answer: Cerebral palsy

🔍 Explanation: Cerebral palsy is a group of disorders caused by brain damage before or during birth. It affects movement, balance, coordination, and motor control. It does not worsen over time but can impact daily activities.

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4. _______________ is a genetic disease that damages muscle fibres.

✔ Answer: Muscular dystrophy

🔍 Explanation: Muscular dystrophy is a group of genetic disorders characterized by progressive weakening and degeneration of muscle fibers. The most common form in children is Duchenne muscular dystrophy.

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5. _______________ is created by practising an action over and over again.

✔ Answer: Muscle memory

🔍 Explanation: Muscle memory refers to the process where repeated practice of a skill leads to improved performance through neural pathways becoming more efficient. This allows actions like riding a bike or typing to become automatic.

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6. _______________ move and support the skeleton.

✔ Answer: Skeletal muscles

🔍 Explanation: Skeletal muscles are attached to bones via tendons. When they contract, they pull on bones to produce movement. They also help maintain posture and support the skeleton.

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7. Muscles work in a very simple way. All they do is tighten up, that is, _________ and _________.

✔ Answer: Contract and Relax

🔍 Explanation: Muscles work by contracting (shortening) to create movement and relaxing (lengthening) to return to their original position. This cycle of contraction and relaxation allows for controlled motion.

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✔ Final Answers:

1. 600
2. Skeletal, smooth, and cardiac
3. Cerebral palsy
4. Muscular dystrophy
5. Muscle memory
6. Skeletal muscles
7. Contract and Relax

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This worksheet helps reinforce basic knowledge about the muscular system, including anatomy, function, and related disorders. Let me know if you'd like a printable version or visual aid!