Anatomy and Cell Biology 3309 Lecture Notes - Lecture 16: Smooth Muscle Tissue, Nuclear Membrane, Intercalated Disc
5 Apr 2018
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Identifying feature of skeletal muscle: multinucleated (each muscle cell has multiple nuclei, number depends on section of cut, it may look like there is one, peripherally located nucleus, pushed to the outside of the sarcomeres, striated. Striations due to a band and i band. Image: banding pattern of striations parallel to one another: white space between the cells = endomysium (loose connective tissue, not well developed, surrounding each muscle cell. Muscle cell fascicle muscle belly. Cardiac muscle: muscle fiber is a chain of muscle cells, found in the myocardium layer of the heart, contract involuntary controlled by autonomic nervous system, found in follow orangs gi tract, uterus, bladder, gallbladder etc. If em image: will find a lot of mitochondria within the perinuclear cytoplasm because the heart is constantly beating, it is an energy dependent process: mitochondria everywhere not just at the poles of the cytoplasm.
