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Unformatted text preview: ber is
surrounded by a basal
lamina and a small
amount of loose CT. Fig. 10-1a Levels of organization in skeletal muscle:
Muscle cells are also called fibers. (Many fibers
are bundled together as a fascicle.)
Inside each muscle fiber are many myofibrils,
each composed of thick and thin myofilaments.
Around these, the sarcoplasm of each muscle fiber
also has mitochondria (M)
and small cisternae of
(smooth ER) -- small little pockets of smooth ER.
Sequesters Calcium ions!!!!! (1 fxn of SER) Fig. 10-10b Cytoplasm
of muscle ﬁber (aka muscle
cell) is organized into bundles
of MYOFIBRILS -- a protein!
Each contain many thick &
think MYOFILAMENTS. All
this inside sarcoplasm of
one muscle ﬁber (cell). Fig. 10-3 Connective Tissue of
Each muscle fiber is surrounded
by a very thin layer of CT, or
endomysium (En). Fibers (and
satellite cells) also are surrounded
by a basal lamina, as shown here
(b) using an antibody against
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This document was uploaded on 02/04/2014.
- Spring '14