Sternum : it's anatomy, upper middle and lower part

Sternum is a long flat bone. It is 15 centimetres in length. It is divided into three segments

1. Manubrium

2. Body

3. Xiphoid process

Upper part manubrium

It is quadrilateral in shape. It's lateral border joints with first rib pair.

It's clavicular notch medial end of clavicle bone articulates.

Body or middle part

It lateral border forms joint with lower part of 2nd C.C. and 3rd C.C. to 6 C.C. and upper half of 7th C.C.

Lower part or xiphoid process

Smallest part, lower part of 7th C.C. articulates.

More anatomy notes available click here