Biology
Answer
Based on the structure and functions performed muscular tissues are of three types — Voluntary muscles, Involuntary muscles and Cardiac muscles.
- Voluntary muscles — These muscles are under our control or will. For example, we can control the muscles in our arms and legs when we run, walk or jump. These muscles are also called skeletal muscles as they are attached to the bones. These muscles help in the movement of the bones. The cells of these muscles are long and cylindrical with many nuclei and dark and light bands called striations. Hence, they are also called striated muscles.
- Involuntary muscles — They are present in the internal organs of our body like stomach, intestine, bladder etc. They are not under our control. The cells of these muscles are spindle-shaped and have only one nucleus. They do not have any bands or striations, hence these are also called unstriated muscles.
- Cardiac muscles — The heart is made up of special type of involuntary muscles called cardiac muscles. Cardiac muscles works continuously without getting tired. Structurally, these muscles resemble voluntary muscles . However, cardiac muscles are similar to involuntary muscles in their function.
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