Osteology of the Thorax Ribs and sternum

Question 1

what does the bony thorax consist of

Answer 1

sternum, ribs, costal cartilage and thoracic vertebrae

Question 2

memorize it.

Question 3

give a simple description of the sternum

Answer 3

the sternum is a flat bone which lies in the neck and it consist of the body, the xiphoid process, manubrium and the costal notches

Question 4

describe the manubrium

Answer 4

the manubrium is the superior wider part of the sternum

Question 5

describe the body of the sternum

Answer 5

the body has 4 segments with 3 ridges connecting them

Question 6

describe the xiphoid process

Answer 6

this is the most inferior part of the sternum and it lays at level with the 9th thoracic rib

Question 7

describe the structure of the ribs

Answer 7

there are 12 paris of ribs
the first 7 ribs are called true ribs which are directly attached to the sternum via CC
Ribs 8-10 are called false ribs meaning they are attached to the sternum indirectly via CC
Ribs 11 and 12 are floating ribs

each rib ends in costal cartilage