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Combinations of characteristics only found in the Phylum Echinodermata are ossicles,water-vascular system,and pedicellarie.
Teres Major
A muscle of the upper limb that helps in the rotation and adduction of the arm.
Pectoralis Major
A large chest muscle that contributes to arm flexion, rotation, and adduction.
Supraspinatus
A muscle located in the back of the shoulder that helps lift the arm away from the body.
Latissimus Dorsi
A large, flat muscle on the back that stretches to the sides, behind the arm, and is involved in the movement of the shoulder.
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