Physiology 502 Muscle Types

skeletal muscle

elongated cells

skeletal muscle

multiple peripheral nuclei

skeletal and cardiac muscle

visible striations

skeletal muscle

voluntary

skeletal muscle

25-100 micrometers in diameter, may be cm in length

skeletal muscle

very thin and long

cardiac muscle

branching cell

cardiac and smooth muscle

single central nucleus

cardiac and smooth muscle

involuntary

smooth muscle

spindle shaped cell

smooth muscle

lack visible striations

smooth muscle

found within the walls of blood vessels, airways, various ducts, uterus, and the digestive tract

skeletal muscle

functions are movement, heat production, and body support and posture

skeletal muscle

properties of tissue include excitability, conductivity, contractility, elasticity, and extensibility

enthesis

bone tendon connection

myotendinous juction

where tendon and muscle intersect

fascia

layer of connective tissue that’s not part of muscle but surrounds and compartmentalizes muscle

endomysium

innermost layer of ECM; surrounds each muscle fiber

perimysium

middle layer of ECM; surrounds each fascicle (group of muscle fibers)

epimysium

part of ECM (outer layer); surrounds muscle

skeletal muscle

post mitotic, cannot divide

largest

muscle fiber (largest, middle or smallest?)

middle

myofibrils (largest, middle or smallest?)

smallest

myofilament (largest, middle or smallest?)