cardiac muscle - striated autonomic involuntry response

skeletal muscle - striated voluntry response

smooth muscle - non striated autonomic

distil attachment - insertion (more movable)

proximal attachment - origin (less movable)

usually muscle contracts in a insertion to origin direction however we can do it the other way (for example quads shortening is different for leg extension and squats)

isotonic vs isometric contraction

isometric the length does not change but the tone does

isotonic the length does change but tone does not

superficial fascia - subcutaneous tissue contains a membrenous and fat layer

deep fascia - they cover muscles which allows smooth contraction of the muscle it also creates a barrier around the muscle which may prevent a disease spreading from one muscle to another. holds tendons in place by formming retinaculanae. also sends septae between muscles to seperate into compartments they also form to allow passage of nerves and blood vessels.

in the arm there is a posterior and anterior compartments formed by deep fascia septums

in the leg

deep fascia is thicker in the leg the septae divides the thigh into 3 compartments anterior,medial and posterior compartments (also have big names)

somatic motor neurons control voluntry skeletal muscles