Anatomy and Cell Biology 3309 Lecture Notes - Lecture 17: Half-Pipe, Monocyte, Vimentin
28 Dec 2017
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Depends on the section of cut: nuclei located at the periphery (pushed to outside of sarcomeres, striated: because of a band and i band (myosin and actin) Lm image: one fascicle in longitudinal cross section: banding patterns that are parallel to one another, ct layer (white spaces): endomysium (loose ct surrounding each muscle cell) Muscle cells make up muscle fascicle where perimysium is found. Epimysium is found around entire belly (bundle of fascicles) Cardiac: found in the heart (myocardium layer: contracts involuntarily, controlled by ans, chain of muscle cells connected together. Smooth: found in hollow organs (gi tract, gall bladder, uterus, urinary bladder: contracts involuntarily, controlled by ans. Rather than having one long cell with multiple nuclei, there are many small cells linked together creating a muscle fiber: fibers can take on branched morphology. Perinuclear cytoplasm in cardiomyocyte is similar to motor neuron: perinuclear cytoplasm where nissl bodies are located. Identifying features: centrally located nuclei, mononucleated (1 nucleus/muscle cell)
