Anatomy And Physiology Of Muscle

Overdevelopment of tissue or an organ that results in a larger mass of tissue or a larger organ, and involves more than the usual number of cells

Increase in size of tissue or an organ due to the increase in the size of the cells

The wasting of muscle or other organ tissues due to disease, lack of use,malnutrition, or poor circulation

Lining certain blood vessels 45-50% body weight is tendons and muscles Support, digestion, muscle contraction

Can shorten in length Fibers don’t stretch

Skeletal Cardiac Smooth

Muscle Fibril…proteins,basic muscle cells, composed of sacromeres Muscle fibers…outer covering is called sacrolemma…made up muscle fibrils Muscle Bundle…grouping of muscle fibers Muscle…group of muscle bundles, 600 muscles in body “seran wrapped”

Red or dark (slow twitch) White or pale (fast twitch) Intermediate (combination of both)

A sheet of fibrous connective tissue that covers, supports, and separates muscles

Ugh fascia that surrounds the entire muscle

The fascia that surrounds the muscle bundles

The fascia that surrounds the individual muscle fibers Helps form tendon

A narrow band of connective tissue that attaches muscle to the bone

Muscle tone, balanced muscle tension

Name Location Origin Insertion Action Structure Relationships Blood supply Nerve supply

Origin: 2 on humerus, 1 on scapula Insertion: olecranon process Action: extension of the front limb at the elbow

Origin: 2 heads on Scapula Insertion: upper radius and ulna Action: flextime of front limb at elbow

Origin: 3 heads with femur…1 head at ilium of pelvis Insertion: tibial tuberosity Action: extension of the hind limb at the stifle..flexing hip

Origin: thoracic vertebrae and lumbar vertebrae Insertion: proximal and medial aspect of humerus Action: pull back front limb at the shoulder

Adduction: adding two limbs…head at medial plane Abduction: spreading two limbs…head moving away from medial plane

Z line to z line