ANAT 1010 Lecture 9: MUSCLE TISSUE
22 Dec 2018
School
Department
Course
Professor
Document Summary
Bones and joints provide leverage and form the framework of the body, but motion results from alternating contraction (shortening) and relaxation of muscles: types of muscle tissue. Cardiac muscle tissue: moves bones (and, in some cases, skin and other soft tissues, striated, voluntary, forms most of the wall of the heart, striated, involuntary, some cells have autorhythmicity. Smooth muscle tissue: located in the walls of hollow internal structures (and arrector pili muscles, nonstriated, i. e. , smooth, involuntary, functions of muscle tissue. Muscle tissue has four major functions: movement of body parts or substances within the body maintenance of posture joint stabilization heat generation: characteristics of muscle tissue. Muscle tissue has four major characteristics that enable it to perform its functions: Excitability (irritability) is the ability to respond to certain stimuli by producing electrical signals called action potentials (impulses). Contractility is the ability to shorten, thus generating force to do work. Extensibility is the ability to be stretched without damaging the tissue.
