Ribs Anatomy Explained Lecture(Part 3)MBBS & FCPS Must Watch | Dr Kainat Jatoi

Описание: Ribs (cost- is Latin for "rib") are the elongate, flattened, arched bones that form a large part of the thoracic wall.The ribs consist largely of highly vascular cancellous bone enclosed by a thin shell of compact bone.
Normally, both males and females have 12 pairs of ribs. The posterior (dorsal; vertebral) end of each rib articulates with one or two thoracic vertebrae. The anterior (ventral; sternal) ends have variable relations that allow the ribs to be categorized as "true" ribs, "false" ribs, or "floating" ribs True ribs (pairs 1 to 7) are connected directly to the sternum via individual costal cartilages.

False ribs (pairs 8 to 10) are connected to the sternum via individual costal cartilages that join together and attach collectively to the seventh costal cartilages.

Floating ribs (pairs 11 to 12) do not attach to the sternum.

Typical Ribs
All ribs share a common structural floor plan. A typical rib is a long, twisted, flat bone having a rounded, smooth superior border and a sharp, thin inferior border.The anterior end of each rib is attached to the
A rib has a head, neck, tubercle, body, angle, and costal groove. The head is the posterior (vertebral) end of the rib and has two facets for articulation with
corresponding vertebral body and that of the vertebra
immediately above (see Fig. 4.4). The neck is the flattened, slightly constricted portion situated between the head and the tubercle. The tubercle is a prominence on the outer posterior surface of the rib at the junction of the neck with the body. It has a facet for articulation with the transverse process of the numerically corresponding vertebra. The body (shaft) is the long, thin, flattened, and twisted (on its long axis) part that extends from the tubercle to
the anterior (sternal) end. The costal groove is the elongate depression along the inferior aspect of the internal surface of the shaft of the rib. This holds the intercostal vessels and nerve. The angle is the point (usually slightly distal to the tubercle) at which the body of the rib bends sharply and turns from a lateral to a more anteriorly directed orientation. The anterior (sternal) end of the rib is flat and has a depression for the costal cartilage.

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