Question

Why are at least two muscles needed to move a bone at a joint in one direction?

Answer 1

Explanation:

one for contraction and one for flexion..

Answer 2

$\huge\mathfrak{Answer:-}$

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⭕ Muscles are specialized tissue of mesodermal origin.

⭕ About 40 to 50% of the body weight of the human adult is contributed by the muscles.

⭕ They have special properties like excitability, contractility, extensibility and elasticity..

⭕ They attach with bones and are under voluntary control of nervous system so they are called voluntary muscles/ skeletal muscles.

⭕ Visceral muscles are located in inner wall of hollow visceral organs. They are involuntary in nature.

⭕ Cardiac muscles are muscles of heart.

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