Embryology And Physiology

STRUCTURE OF
SKELETAL MUSCLES
Muscle Mass
 The muscle cells (muscle fibers)
are long and slender in
appearance.
 The muscle cells are
multinucleated arranged parallel to
one another with some connective
tissue in between.
 The muscle mass is separated from
the neighboring tissue by the thick
fibrous tissue layer known as
fascia.
 Beneath the fascia, the connective
tissue covering the muscle is
called epimysium.

, STRUCTURE OF SKELETAL MUSCLES
(CONTINUED)

 In the muscle, the muscle
fibers are arranged in various
groups called the bundles or
fasiculi.
 The Connective tissue sheath
that covers each faciculi is
called Perimysium.
 Each muscle fiber is covered
by the connective tissue layer
called the endomysium.

, MUSCLE FIBER (CONTINUED)


 The structures embedded
within the cytoplasm is nuclei,
myofibril, golgi apparatus,
mitochondria, sarcoplasmic
reticulum, ribosomes, glycogen
and occasional lipid droplets.
There are one or more nuclei in
each muscle fiber.
 In long muscle fibers many
nuclei are seen.
 Nuclei are oval or elongated
and situated beneath the
sarcolemma.

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