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  • Angelyn Evan Bomediano posted an update in the group Group logo of MT 30 LAB - HMT 30 LAB – H 4 years, 3 months ago

    • Muscle tissue is made up of cells that can shorten or contract to move the bodily components. The tissue is very cellular and blood vessel-rich. Muscle fibers are long, slender cells organized in bundles or layers surrounded by connective tissue. Muscle actin and myosin are contractile proteins.

      Muscle tissue is divided into three types: skeletal, smooth, and cardiac.Sm

      Smooth Muscle. The autonomic nervous system controls the muscle present in hollow internal organs such blood vessels, gastrointestinal tract, bladder, and uterus. Smooth muscle is uncontrollable and hence unconsciously acts. The nonstriated (smooth) muscle cell has a single nucleus. Smooth muscle contracts slowly.

      Cardiac Muscle.  The autonomic nervous system controls the heart’s wall muscle. Like smooth muscle, cardiac muscle is striated like skeletal muscle. The heart muscle cell is square. Cardiac muscle contractions are automatic, powerful, and rhythmic.

      Skeletal Muscle. This muscle attaches to bone and controls skeletal motions. The peripheral CNS controls the skeletal muscles. These muscles are voluntarily controlled. The basic unit is the nucleated muscle fiber. These striated muscle fibers function independently of one another. Skeletal muscle functions include movement, heat production, and posture. Muscle tissue has five functional characteristics:
      1. Irritability-responsiveness to stimuli.
      2. Conductivity-transmitting impulses.
      3. Extensibility-stretchability
      4. Elasticity-recovery of original length after stretching.
      5. Shortening ability

      References
      National Cancer Institute. (n.d.). Muscle Tissue. https://training.seer.cancer.gov/anatomy/cells_tissues_membranes/tissues/muscle.html#:~:text=Muscle%20tissue%20is%20composed%20of,well%20supplied%20with%20blood%20vessels

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