标题: How Healthy Flow Blood Improves Your Wellness Routine [打印本页] 作者: IonaFierro 时间: 2025-9-18 05:24 标题: How Healthy Flow Blood Improves Your Wellness Routine In comparison with the large cylinders of skeletal muscle, cardiac muscle cells, or cardiomyocytes, are significantly shorter with a lot smaller diameters. Cardiac muscle additionally demonstrates striations, the alternating pattern of dark A bands and gentle I bands attributed to the precise association of the myofilaments and fibrils which are organized in sarcomeres along the length of the cell (Figure 19.17a). These contractile parts are just about similar to skeletal muscle. T (transverse) tubules penetrate from the floor plasma membrane, the sarcolemma, to the inside of the cell, permitting the electrical impulse to achieve the interior. The T tubules are only found on the Z discs, whereas in skeletal muscle, they're found at the junction of the A and that i bands. Therefore, there are one-half as many T tubules in cardiac muscle as in skeletal muscle. As well as, the sarcoplasmic reticulum shops few calcium ions, so many of the calcium ions must come from outside the cells.