closes the eye
Orbicularis Oculi
Contains only thin filaments (actin)
I band
Subscapularis
Brevis
Short
Action 1
Shoulder flexion
Extends forearm at elbow joint and extends arm
at shoulder joint
Triceps Brachii
A light region in the middle of the A band
H zone
Sartorius
Pectoralis
Chest
Action 2
Shoulder abduction
pulls the corner of mouth laterally; presses the
cheek against the teeth
buccinator
Edges of a sarcomere are determined by this
Z line
Rectus Femoris
Deltoid
Triangular
Shoulder circumduction
Lateral fibers abduct arm at shoulder joint
Anterior fibers flex & medially rotate arm at
shoulder joint
Posterior fibers extend & laterally rotate arm at shoulder joint
Deltoid
The dark band in skeletal muscle
A band
Sternocleidomastoid
Rectus
Straight
Action 4
Shoulder internal rotation/medial rotation (elbow extended)
Name the 3 muscles that flex leg at knee joint & extends thigh at hip joint
A dark line in the middle of the A band
M line
Latissimus dorsi
Interosi
In between bones
Action 5
Shoulder external rotation/lateral rotation at 90 degrees