Bone Anatomy Radius. The annular ligament is attached by both its ends to the anterior and posterior margins of the radial notch of the ulna together with which it forms the articular surface that surrounds the head and neck of the radius. The atlas bone is the first of seven cervical vertebrae.
The joint between the ulna and humerus is a hinge type of joint. Long bones are found in the arms humerus ulna radius and legs femur tibia fibula as well as in the fingers metacarpals phalanges and toes metatarsals phalanges. The flexor muscles are located on the anterior volar surface of the forearm and are attached by tendons to the phalanges of the fingers.
The outer shell of the long bone is compact bone below which lies a deeper layer of cancellous bone spongy bone as shown in the following figure.
The outer shell of the long bone is compact bone below which lies a deeper layer of cancellous bone spongy bone as shown in the following figure. Unlike the radius this bone does not twist so when the hand changes position the ulna is always in the same position on the inside part of the forearm. The bottom of the humerus touches the top of the radius and ulna which joins the upper arm with the lower arm. The annular ligament is attached by both its ends to the anterior and posterior margins of the radial notch of the ulna together with which it forms the articular surface that surrounds the head and neck of the radius.
