Page 230 - Ultimate Visual Dictionary (DK)
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THE HUMAN BODY
Muscles 2 MUSCLES OF FACIAL
EXPRESSION
A single expression
is the result of
Myofibril movement of many
SKELETAL MUSCLE FIBER muscles; the main
muscles of expression
are shown in action
below.
FRONTALIS
Sarcomere
Motor
end plate
Nucleus
Synaptic
knob
Sarcoplasmic
reticulum
CORRUGATOR
SUPERCILII
Sarcolemma
Schwann
cell
Motor Endomysium
neuron
Node of
Ranvier
ORBICULARIS ORIS
TYPES OF MUSCLE
CARDIAC MUSCLE SKELETAL MUSCLE SMOOTH MUSCLE ZYGOMATICUS MAJOR
CONTRACTION OF SKELETAL MUSCLE
DEPRESSOR ANGULI
RELAXED STATE CONTRACTED STATE
ORIS
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