The bone system

Wrist

The manus has a skeleton in which the carpal bones (ossa carpi), metacarpi metacarpi biceps and fingers of the fingers are called phalanges digitorum manus.

Radius

Radial bone (radius) on the proximal end has a head of radius (caput radii) with a flat indentation - articular fovea (fovea articularis) for articulation with the head of the condyle of the humerus.

Elbow bone

The ulna (ulna) in its upper part is thickened. At this (proximal) end is the incisura trochlearis (incisura trochlearis), intended for articulation with the humerus block.

The forearm bones (ossa antebrachii) consist of two bones. The ulnar bone is medially located, laterally - the radius bone. These bones touch each other only at their ends, between their bodies there is an intercostal space of the forearm.

Brachial bone

The humerus is a long tubular bone. Distinguish the body of the humerus (corpus humeri) and the two ends: the upper and lower. The upper end (proximal) is thickened and forms the spherical head of the humerus (caput humeri).

Collarbone

Clavicula (clavicula) is a long S-shaped tubular bone located between the clavic notch of the sternum medially and the acromial process of the scapula laterally.

Scapula

Scapula is a flat bone of triangular shape. It is attached to the thorax from its posterolateral side at the level of II to VII ribs. Three angles are distinguished at the scapula: the inferior angle (ingulus inferior), the lateral (angulus lateralis) and the upper (angulus superior).

Bones of upper limb

The skeleton of the upper limbs includes the upper extremity belt and the free parts of the upper limbs.

Skeleton of the extremities

In the process of human evolution, the upper limbs became the organs of labor. The lower extremities perform the functions of support and movement, keep the human body in an upright position.

Maxillary sinus

The maxillary, or maxillary sinus (sinus maxillaris) is the cavity of the upper jaw. The anterior wall of the sinus in the center is thin, thickens in the peripheral parts. This wall is formed by a part of the upper jaw between the infraorbital margin and the alveolar process.