שרירים Flashcards
פריסטלטיקה-
בקרת מעבר של חומרים-
3 types of muscle tissues
- skeleton
- smooth
- cardiac
Fascia
is a
dense sheet or broad band of irregular connective tissue that lines
the body wall and limbs and supports and surrounds muscles and
other organs of the body. As you will see, fascia holds muscles with
similar functions together (see Figure 11.21). Fascia allows free
movement of muscles; carries nerves, blood vessels, and lymphatic
vessels; and fills spaces between muscles.
Epimysium
is the outer layer of fascia,
encircling the entire muscle. It consists of dense irregular connective tissue.
Perimysium
is also a layer
of dense irregular connective tissue, but it surrounds groups of
10 to 100 or more muscle fibers, separating them into bundles
called fascicles (FAS-i-kuls little bundles). Many fascicles
are large enough to be seen with the naked eye. They give a cut
of meat its characteristic “grain”; if you tear a piece of meat, it
rips apart along the fascicles.
Endomysium
penetrates the
interior of each fascicle and separates individual muscle fibers
from one another. The endomysium is mostly reticular fibers.
myoblasts
mesodermal cells of muscle
sarcolemma
the plasma membrane of a muscle cell
myofibrils
At high magnification, the sarcoplasm appears stuffed with little
threads. These small structures are the myofibrils (mı¯-oˉ-FI¯-brils;
myo- muscle; -fibrilla little fiber), the contractile organelles
of skeletal muscle (Figure 10.2c). Myofibrils are about 2 m in
diameter and extend the entire length of a muscle fiber. Their
prominent striations make the entire skeletal muscle fiber appear
striped (striated).
Tendons and aponeuroses
extensions of connective tissue beyond muscle fibers that attach the muscle
to bone or to other muscle. A tendon is generally ropelike in shape; an aponeurosis is wide and flat.
Fascia
Соединительная ткань которая покрывает стенки организма органы а также поддерживает и покрывает мышцы. Соединяет мышцы с похожими функциями делятся на три слоя
Epimysium
Соединительная ткань которая покрывает всю верхнюю часть мышцы
Perimysium
Соединительная ткань которая покрывает группы клеток от 10 до 100 клеток объединяет клетки в группы и отделяют друг от друга
Endomysium
Ретикула. покрывает каждую клетку в отдельности
Fascicles
Группа клеток соединенных вместе .от 10 до 100 клеток