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Describe the structure of smooth muscles in 2 points. Give no links pls!!!

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Cells of smooth muscles are cylindrical, unbranched, and involuntary (muscles which are not in our control). The contractile fibrils in smooth muscles are not highly ordered. They contract slowly and do not undergo fatigue.



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1. ​Molecular structure. A substantial portion of the volume of the cytoplasm of smooth muscle cells are taken up by the molecules myosin and actin, which together have the capability to contract, and, through a chain of tensile structures, make the entire smooth muscle tissue contract with them.

2. Each type of muscle tissue in the human body has a unique structure and a specific role. Skeletal muscle moves bones and other structures. Cardiac muscle contracts the heart to pump blood. The smooth muscle tissue that forms organs like the stomach and bladder changes shape to facilitate bodily functions.
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Structure of smooth muscles:
  • These muscle fibres are uninucleated and spindle shaped.
  • They are not enclosed by membrane but many fibres are joined together in bundles.
  • Such muscles are found in the walls of stomach, intestine, urinary bladder, bronchi, iris of eye, etc.

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