Doc Ariel General Myology Flashcards
Muscular System
Composed of cells with contractility and conductivity.
Muscle Fiber
Functional cell unit of the muscular system.
Contractility
Ability of muscle cells to shorten.
Conductivity
Ability to transmit electrical impulses.
Locomotion
Movement through flexion, extension, and rotation.
Respiration
Muscle function aiding in breathing.
Circulation
Muscle role in blood flow.
Alimentation
Muscle function related to feeding.
Smooth Muscle
Non-striated, involuntary muscle found in organs.
Striated Involuntary Muscle
Cardiac muscle with cross striations, rhythmic contractions.
Striated Voluntary Muscle
Skeletal muscle controlled voluntarily, multinucleated.
Sarcolemma
Thin membrane surrounding each muscle fiber.
Endomysium
Connective tissue surrounding myofibrils.
Perimysium
Connective tissue surrounding muscle fascicles.
Epimysium
Outer sheath wrapping entire muscle.
Belly of Muscle
Expanded portion of a muscle.
Origin of Muscle
Fixed point of muscle attachment.
Insertion of Muscle
Movable point of muscle attachment.
Sesamoid Bones
Small bones under tendons, protect and redirect pull.
Bursa
Fluid-filled sacs reducing friction between tissues.
Synovial Tendon Sheaths
Double-layered sacs wrapping tendons in grooves.
Fascia
Connective tissue binding muscles and providing routes.
Accessory Structures
Includes sesamoid bones, bursae, and fascia.
Purkinje Fibers
Special fibers conducting impulses in cardiac muscle.
Dark Fibers
Red fibers for sustained contractions.
Pale Fibers
White fibers for quick, forceful contractions.
Extrinsic Muscles
Muscles responsible for shoulder and upper arm movement.
Trapezius
Extrinsic muscle aiding in shoulder movement.
Latissimus Dorsi
Extrinsic muscle involved in arm movement.
Tendon
Connective tissue attaching muscle to bone.
Aponeurosis
Flat sheet-like connective tissue for muscle attachment.
