ole

Isittusele

Ae Striated - usually skeletal muscles, except for tongue and
eye mscles which are also stristed--the voluntary muscles

Be. Smveth or involuntary mscle tissue--lines the walls of the
. vVieeera, bleed vessels, ducts of glands

Gs Gardines-wells of the heart striated with intereal ted disks

Ile Skeletel Muscles + about 46 % of body weighte About 700 mscles
move aporeximately 206 bonese :

Ae Structure

ls Musqle cell or fiver ie about one inch to one and one.
half inches long, and about 10-110 microns in diameter,
(reduce to millimeter »leron is 1/1000 of M or 1/2500 of

2» Sercolemma covers muscle celle The tendon fiver extends
from the end of the coll to the tendon, The sarcolemma |
tends to fuse with these tendon fivers to the tendon.

Se Nuclei are along the edge of the msele between the sere
colemmae

4. Soarcostyles or fibriles are rodlike parts of the muscles

These ere made up of separate compartments or segments
« im these sarcomeres are light bands

cated the I bands (disk) and dark colored bends oalled
the A» bands. The lig’t colored bands contain certain
potassium salts and is tt fluid part. When the mscle
eontracts, the I bands become dark and the Q bands be=
come lighter. The effect is like the opening and closing
of a shutter. The I and A bends do not extend across the
entire mscle celle The two diske which extend seross en-
tire cell bold sarcomeres in place.

The myoeneuro= junction is the place where the nerve fiber
joins the museole cellj also called motor end plate.

Muscle cell