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SHOULDER MUSCLES

The deltoid (sometimes consisting of distinct muscles) is the primary abductor of the tetrapod arm. The single human deltoid muscle is homologou to the clavodeltoid, acromiodeltoid, and spinodeltoid found in many other mammals.

FROG

FROG

TURTLE

DELTOID

ALLIGATOR

DELTOID

OPOSSUM

DELTOID

 

CAT

DELTOID

DELTOID

GOAT

DELTOID

DELTOID

SHEEP

DELTOID

PIG

DELTOID

MONKEY

DELTOID

HUMAN MODEL

DELTOID