muscle exam

short

widest

longest

huge

large

saw toothed shape

pear shaped

flat

four sided

decreases size of opening

makes body partly rigid

• terminate in flat tendons
• bundles are in parallel to the long axis

ex styloid

• terminate in flat tendons
• bundles are in parallel to the long axis
• muscles tapers toward tendon- diameter less than at teh belly of the muscle- digastric

short bundles in relation to muscle length.  Tendon extends nearly the entire length of muscle.

unipene, bipennate, multipennate

• bundles on only one side of tendon. 
• ex- extensor digitorum longus

• bundles on both sides of centrally placed tendon
• rectus femorus

bundles attach obliquely from many directions to several tendons

deltoid

movement posture, respiration, production  of body heat, communication, constriction of organs and vessels, contraction of heart

skeletal muscle fibers within a muscle are arranged in bundles 

• contractility- ability to shorten with force
• excitability- respond to stimulus
• extensibility- can stretch
• elasticity- recoil to original lasting strength

connective tissue that surrounds entire skeletal muscle outside

bindles of muscle fibers

connective tissue around each muscle fasciculus

a fasciculus is composed of several muscle cells

loose connective tissue that surrounds each muscle fiber.