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Gross Anatomy of the Rib Cage and Sternum

Gross Anatomy of the Rib Cage and Sternum

Author: Aaron Mullally
Description:

- know the three bones of the sternum

- know how many ribs there are

- know that the rib cage can be broken down into three regions

- know what the three regions of the rib cage are (true, false, floating ribs)

- be able to differentiate between the sternal and vertebral end of a rib

- know the landmarks of a rib

This packet goes over the gross anatomy of the sternum and rib cage.

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Tutorial

Overview

The sternum is divided into three parts. From superior to inferior: manubrium, body, xiphoid process.

There are 12 pairs of ribs for a total of 24 individual ribs. The rib cage can be divided into three different parts; true ribs, false ribs, floating ribs. True ribs are individuall attached to the sternum via their costal cartilages; there are 7 pairs or 14 total true ribs. The false ribs are 8-10 and the costal cartilage of these articulate with the costal cartilage of rib 7. Ribs 11-12 are called floating because they have no costal cartilage and don't articulate with anything on the anterior side. False ribs don't contribute to the breathing process but they still have purpose. They are used to shield organs within the upper parts of the abdominal cavity.

Source: Mind of Aaron

Rib Cage and Sternum

Source: Self made with Netter

Rib and Sternum Images

Here are some images of the sternum and rib cage for you to view

Source: Self made