Humerus, which is also known as the upper arm bone, is located between the shoulder joint and the elbow joint. It is considered the longest bone of the upper body of a human being. The humerus bone provides support to the arm. It also helps in various movements of the arm and shoulder.

Parts of the Humerus Bone

Head: It is round in shape and thus interacts with the glenoid cavity of scapula (shoulder blade) to form the shoulder joint.

Tubercles: This acts as the point of attachment for the muscles of the shoulder joint.

Surgical neck: Located at the base of the proximal humerus.

Epicondyles: Present at the lower end of the humerus; these are bony protrusions of the humerus.

Trochlea: Present in the lower part of the humerus; it interacts with the ulna bone in the lower arm.

Capitulum: This part of the humerus bone interacts with the radius bone of the lower arm

Related Links

• Bones of the Arm
• Functions of Humerus Bone

Visit BYJU’S Biology for more information.