BSC 1086C Chapter Notes - Chapter 10: Endocrine System, Neurotransmitter, Extracellular Fluid
Document Summary
Muscular tissue accounts for 40 to 50% of total body mass. Pumping of blood through blood vessels: involuntary. Moving our skeleton: voluntary: overview of muscular tissue. Myology: scientific study of the structure, function, and diseases of skeletal, cardiac, and smooth muscular tissues. There are three types of muscular tissue:differ in their microscopic anatomy, location, and how they are controlled by nervous and endocrine systems. Voluntary (consciously controlled) contraction to move skeleton. Some attach to skin or other skeletal muscles (facial expressions) Intercalated discs:unite one muscle fiber with another; important to maintain autorhythmicity. Gap junctions: allow communication between the cells. Histology of cardiac muscle: smooth muscle tissue. Located in walls of hollow internal organs and structures (abdominal pelvic cavity. Thin filaments: attached to dense body (hold the muscle fibers together) Bundles of intermediate filaments connect the dense bodies on the sarcolemma. Visceral (single-unit) smooth muscle tissue: muscle fibers are united) Multiunit smooth muscle tissue: muscle fibers are isolated.
