Bones:
a. Humerus: The upper arm bone, extending from the shoulder to the elbow.
b. Radius: One of the two forearm bones, located on the thumb side of the forearm.
c. Ulna: The other forearm bone, located on the pinky side of the forearm.
Joints:
a. Shoulder Joint: The connection between the humerus and the shoulder blade (scapula).
b. Elbow Joint: The junction of the humerus, radius, and ulna.
c. Radio ulnar Joints: Two joints (proximal and distal) between the radius and ulna that allow for forearm rotation.
d. Wrist Joint: The connection between the radius, ulna, and a group of carpal bones in the wrist.
Muscles:
a. Biceps Brackish: Located on the front of the upper arm, responsible for flexing the elbow and rotating the forearm.
b. Triceps Brachii: Located on the back of the upper arm, responsible for extending the elbow.
c. Brachialis: A muscle underneath the biceps that assists in elbow flexion.
d. Deltoid: The shoulder muscle that allows arm abduction and rotation.
e. Forearm Muscles: These include flexor and extensor muscles that control wrist and finger movements.
Tendons:
a. Tendons are tough, fibrous tissues that connect muscles to bones. They enable the muscles to control the movement of the arm.
Ligaments:
a. Ligaments are strong bands of connective tissue that connect bones to each other and provide stability to the joints in the arm.
Blood Vessels:
a. The brachial artery supplies blood to the upper arm.
b. Radial and ulnar arteries supply blood to the forearm and hand.
c. Veins accompany these arteries to return blood to the heart.
Nerves:
a. The brachial plexus is a network of nerves that provides motor and sensory innervation to the arm and hand. It originates in the neck and extends into the arm.
b. The median, ulnar, and radial nerves are some of the major nerves that control arm movements and sensation.
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