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Muscles in the arms - Coggle Diagram
Muscles in the arms
Upper arm
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Posterior upper arm
Tricep branchii
The triceps brachii is the muscle that runs down the back of the humerus, which is the long bone of the upper arm, and ends at the top of the ulna, which is the long bone of the forearm. 
Lower arm
Anterior lower arm
Flexor carpi ulnaris
Palmaris longus
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Deltoid
The deltoid muscle is a rounded, triangular muscle located on the uppermost part of the arm and the top of the shoulder.
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