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skeletal muscle tissue - Coggle Diagram
skeletal muscle tissue
function of muscle
maintenance of posture
joint stabilization
movement
cardiac muscle
smooth muscle
skeletal muscle
heat generation
nuture of function
excitability
extensibility
contractility
elasticity
type of muscle
striated muscle
visceral striated muscle
cardiac muscle
skeletal muscle
smooth muscle
striated muscle fibers (cells)
held together by connective tissue
perimysium
endomysium
epimysium
basic feature
one artery
enter or exit the middle of its length
one or more veins
one nerve
capillaries are wavy when the muscle fibers contract and
stretched straight when the muscle extended
attachment
origin→insertion
direct,fleshy
inderect
tendon
aponeurosis
type of skeletal muscle fibers(cells)
2fast oxidative fibers
many mitochondria, high myoglobin content
and rich supply of capillaries
contract quickly like fast glycolytic fibers
intermediate fibers
large amounts of glycogen,
capable of anaerobic glycolysis
fast-twitch,oxygen-dependent
lower limbs
3 fast glycolytic fibers
store glycogen
more myofilaments,generate more power
ittle myoglobin and fewer mitochondria
fast-twitch,anaerobic pathway
light pink large fiber
upper limbs
1slow oxidative fibers
strong succinic dehydrogenase and NADH-TR staining
large numer of mitochondria,rich supply of capillaries
slow-twitch,aerobically
posture
myoglobin(red),small in diameter
function of skeletal muscle fiber
formed by fusion of embryonic cells
multinucleate
length(cm)
huge(diameter is 10-100 µm)
nuclei are peripherally loca
accessory protein
tropomodulin
myomesin
nebulin
c protein
α-actinin
desmin
titan
dystrophin
basic feature of skeletal muscle
sarcolemma
sarcoplasmic reticulum
smooth ER
T tubules
myofibri
80％sarcoplasm
myofilaments
thick filaments
myosin ll
thin filiaments
tropomyosin
troponin
C
T
I
actin
F
G
sarcomere
Z disc
(thin)actin flaments
Iband
isotropic
(thick)myosin ll filaments
H zone
A band
anisotropic
M line
myofibrils
life
myoblasts
satellites cells
Sarcopenia 肌肉減少症
Sliding Filament Mechanism
Contraction Cycle
proprioreceptors 本體感受器
Motor Units