biceps brachii
sartorius
F.S.BK. F.S.BK.
(A)
(B)
parallel
fusiform
deltoideus
rectus femoris tibialis
F.S.BK.
(C)
pennate
temporal muscle
orbicularis oculi
orbicularis oris F.S.BK.
F.S.BK.
(D)
radiate
(E)
circular
E
effort
F
fulcrum
R
resistance
R E E E R R F R E
F
F R F
F F.S.BJ.
(A) (A)first-class lever
E
E
R
F F.S.BJ.
(B) (B) second-class lever
F.S.BJ.
(C) (C)third-class lever