types of muscles (subset)
Epimysium
(outside muscle) an overcoat of dense irregular connective tissue that surrounds the whole muscle
Excitabilty
(responsiveness, irritability); the ability of muscle tissue to recieve and respond to a stimulus, that is any change in the environment either inside or outside the body
Endomysium
(within muscle) a whispy sheath of connective tissue that surrounds each individual muscle fiber
Muscle Functions
Produce Movement, Maintain Posture and Body Position, Stabalize Joints, Generate Heat
Elasticity
ability of muscle cell to recoil and resume its resting length after being stretched
Contractility
ability of muscle tissue to shorten forcibly when adequetly stimulated
Skeletal Muscle
each is a discrete organ, made up of serveral kinds of tissues; skeletal muscle fibers predominate, but blood vessels, nerve fibers, and substantial amounts of connective tissue are also present
Perimysium
fibrous connective tissue; surrounds each fasicle (grouped muscle fibers that resemble bundles of sticks)
Sarco
flesh
Smooth Muscle Tissue
found in the walls of hollow visceral organs, such as the stomach, urinary bladder, and respiratory passages; forces fluids and other substances through internal body channels; elongated "fibers"; not striated; not voluntary
Connective Tissue Sheaths
hold together and wrap around individual muscle fibers; support each cell and reinforce the muscle as a whole
Origin
less movable bone; typically lies proximal to the insertion
Insertion
movable bone, moves towards the immovable or less movable bone
Cardiac Muscle Tissue
occurs only in the heart, where it constitutes the bulk of the heart walls; striated; not voluntary
Skeletal Muscle Tissue
packaged into skeletal muscles, organs that attach to and cover the bony skeleton; longest muscle cells; have strips called striations; a voluntary muscle; responsible for overall body mobility
Myo or Mys
root words meaning "muscle"
Muscle Fibers
skeletal and smooth muscles; are elongated; diameter ranges from 10 to 100 um (10 times that of an avergage body cell); multiple nuclei
Types of Muscle Tissue
skeletal, cardiac, smooth; each served by one nerve, an artery, and one or more veins
Extensibilty
the ability of muscle tissue to be stretched or extended