Muscular System Maria Estrada Per.2 (Body movement terminology (Pronation …
Muscular System Maria Estrada Per.2
Structure and organizational levels of the skeletal muscle
Tissue level -- neuromuscular junctions and fascicles
Organ level -- major skeletal muscles of the body
Cell level -- sarcomere and myofibrils
Microscopic level -- sarcomere and myofibrils
Names of the muscles
Cardiac muscle -- involuntary, striated muscle that constitutes the main tissue of the walls of the heart.
Smooth -- which the contractile fibrils are not highly ordered.
Skeletal muscle -- are attached to bones by bundles of collagen fibers known as tendons.
Should be categorized based on location and their actions
3 types of muscle tissues & their major functions/characteristics
Body movement terminology
Supination -- always acts together with biceps, except when the elbow joint is extended
Plantar Flexion --
Rotation -- circular movement of a joint or muscle
Circumduction -- muscular and joint movement that entails complete 3600 movement
Adduction -- movement of a body part toward the body's midline
Abduction -- movement away from the middle of the body
Extension -- normal straightening movement of a joint or muscle that increases
Flexion -- bending movement of a joint or muscle that decreases
Major functions of the muscular system
Respiration -- that contribute to inhalation and exhalation, by aiding in the expansion and contraction of the thoracic cavity.
Digestion -- enables their walls to move.
Circulation -- cardiac and smooth muscles help your heart beat and blood flow through your body by producing electrical impulses.
Posture -- is the position in which we hold our bodies while standing, sitting, or lying down.
Urination -- the brain signals the bladder muscles to tighten, squeezing urine out of the bladder.
Physiology of muscle contraction