Question

Why smooth muscles are also called involuntary?

Answer 1

Smooth muscles are known as involuntary because they cannot be controlled consciously.

Answer 2

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▶Smooth Muscles are called involuntary muscles because:-

[1] They never get fatigued.
[2] They contract tirelessly throughout life.

➧Types 0f Muscular Tissue are:-▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃⤵

❶❫ Striated Muscles:-▬▬▬▬▬▬▬▬▬▬▬☟

◉ Also known as Skeletal Muscles.

◉ It attached to bone in Limbs.

◉ Types of control is voluntary.

◉ It forms bundles.

◉ No. of nuclei is Multinucleate.

◉ Nerve supply is from central nervous system.

◉ Speed of contraction is most rapid.

❱ Its Functions are:-════════════════☟

①❭ They are responsible for locomotion.

②❭ It control the breathing movement.

③❭ This muscles are also help in in digestion of food.

④❭ They are also help in blinking of Eyes.

❷❫ Non-Striated Muscles:-▬▬▬▬▬▬▬▬▬▬▬▬☟

◉ Also known as Smooth Muscles.

◉ It attached in the walls of stomach, intestine & blood vessels.

◉ Types of control is involuntary.

◉ It forms sheet or sphincter.

◉ No. of nuclei is uninucleate.

◉ Nervous supply is from autonomic nervous system.

◉ Speed of contraction is slowest.

❱ Its Functions are:-════════════════☟

①❭ Muscles of iris & ciliary body of eye control amount of light to enter the eye.

②❭ Ciliary muscles body are responsible for accommodation of lens.

③❭ Sphincter bring about 0pening & closing of anal aperture, tubes & cavities.

④❭ They relax & contract the walls of arteries, ducts & uterus.

❸❫ Cardiac Muscles:-▬▬▬▬▬▬▬▬▬▬▬☟

◉ Also known as Heart Muscles.

◉ It attached in the walls of hearts.

◉ Types of control is Involuntary.

◉ It forms a network.

◉ No. of nuclei is Uninucleate.

◉ Nerve supply is from autonomic nervous system.

❱ Its Functions are:-════════════════☟

①❭ They helps in pulsating movement of heart chamber.

②❭ They pump blood from heart into the blood vessels.

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