KINESIOL 2YY3 Lecture Notes - Lecture 3: Coronary Sinus, Interventricular Septum, Cardiac Muscle Cell
16 Jan 2018
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Cardiac muscle is similar to skeletal muscle but there are differences. Skeletal muscle fiber is a long cylinder that runs the entire length of the cell, but a shorter, has branching cells, has 1-2 centrally located nuclei), and don"t run the ent. Cardiac muscle has fewer nuclei than skeletal muscle. The reason for this is that there aren"t many myofibrils in a cardiac muscle ce. In skeletal muscle the nuclei was pushed to the sides of the plasma membran and we did not want the nuclei to interfere with myofibril contraction. Due to a smaller number of myofibril in the cardiac muscle cell, the nuclei be. The myofibrils in cardiac muscle cells aren"t as organized (we can only kind of myofibril) The contractile proteins are the same: actin and myosin myofilaments. Cardiac muscle fiber sarcolemma has openings for transverse tubules. Not organized as regularly as they are in skeletal muscle (little bit more random, few.
