NATS 1650 Lecture Notes - Lecture 9: Rotator Cuff Tear, Cardiac Muscle, Myocyte
8 Jan 2020
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Muscle tissue converts chemical energy to mechanical energy, and is the only thing to do that in the body. See it in areas where things have to be moved on; intestines, bladder. Heart: in the walls of the heart. When your heart beats, that is all the cardiac muscles in the heart contracting. Muscles are interconnected: connected to the muscles around them. Most focus is on this; the muscle that moves you. Muscle fiber: a muscle cell; called a fiber because they are elongated. Cardiac muscle cells, we don"t use fiber because they are not stretched out. Stabilizing joints; rotator cuffs in shoulder: keeping the bones secure. Will contract to make to lumen smaller to send it somewhere else where we need it more. Each muscle fiber, or muscle cell, has a nerve branch going to it from the brain. Muscle cannot do anything without a nerve going to it.
