Bio skeletal and muscular system notes

functions of the muscular system

- movement of the body

- maintaining posture

- generates body heat

- role in other body systems 
    (respiration, digestion, urination)

skeletal muscle

striated, voluntary

Smooth muscle

non striated, involuntary

cardiac muscle

heart

FASCIA

separates individual muscles

Three Different Types of Connective Tissue

epimysium, perimysium, endomysium

epimysium

outermost layer of the muscle. surrounds it

perimysium

separates and surrounds fascicles (bundles of muscle fibers)

endomysium

surrounds individual muscle fiber

Sarcolemma

muscle fiber membrane

Sarcoplasm

inner material surrounding fibers  (like cytoplasm)

Myofibrils 

individual parallel muscle fibers within sarcoplasm

Actin

thin filaments/ band

myosin

thick filaments / band

A band

Dark, thick, myosin

I band

Light, thin, actin