Question

Identify each type of muscle cell, their functions, locations, and describe how they look under microscope.

Answer 1

There are three types of muscle cells

(1) Smooth muscle cells

(2) Cardiac muscle cells

(3) Skeletal muscle cells

Location of muscle cells:

(1) Smooth muscle cells - located in walls of hallow organs like uterus, bladder, stomach, alimentary canal.

(2) Cardiac muscle cells - located in heart (cardia)

(3) Skeletal muscle cells - located between the bones and helps in movement of bones/Skeletal system.

Function of these muscle cells:

(1) The function of smooth muscle cells are controlled by ANS

* Since they are found in the hallow organs, they play an important role in

• in ducts of exocrine gland

• sealing the orifice in uterus os, pylorus

• transport of chyme via interstinal tube

(2) The function of cardiac muscle cells is to contact the heart and pump blood and it's involuntary controlled by Automatic nervous system.

(3) The function of Skeletal muscle cells is to move bones and skeletal since it's a voluntary movement and controlled by somatic nervous system

Microscopy:

(1) Smooth muscle cells- eosinophilic cytoplasm /single oval nucleus at centre and cigar like during contraction.

Anchored to basal lamina by connective tissue.

(2) Cardiac muscle cells- striated and uni or binucleate, cells join via intercalated disks

(3) Skeletal muscle cells- striated the cells containing alternative light and dark band (striations) and packed in regular parallel bundles.