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red
sterno cleidomastoid

blue
splenius

green
spinalis

red
longissimus

dark blue
iliocostalis

blue
rectus abdominis

yellow
external oblique

red
diaphragm

yellow
transversus abdominis

blue
myosin

red
myosin

green
z line

orange
actin

green
muscle fiber

red
endomysium

orange
perimysium

green
epimysium

red
tendon

grey
muscle belly

green
sarcolemma

blue
sarcoplasmic reticulum

blue
sacromere

red
myofibril

whole thing
muscle fiber

middle
thick filament

ends
thin filament

blue
infraspinatus

orange
latissimus dorsi

yellow
supraspinatus

blue
infraspinatus

yellow
supraspinatus

blue
infraspinatus

red
pectoralis major

red
pectoralis minor

pink
subscapularis

pink
rhomboid major and minor

yellow
trapezius

blue
teres major

blue
teres major

orange
deltoid

red
pectoralis minor

blue
triceps branchii

red
bicep branchii

yellow
motor neuron

red
muscle fibers

green
sacrolemma

blue
receptor

yellow dot
neurotransmitter acetylcholine

orange
axion

red
axion terminal

gap inside
synaptic cleft

red
gluteus maximus

yellow
gluteus medius

blue
gluteus minimus

black
teres minor