The xiphoid process of the sternum is the inferior most aspect.
The xiphoid process:
a. Articulates with lower edge of sternal body and R7
b. Cartilaginous at birth, then ossifies
c. Important landmark
i. inferior limit of thoracic cavity anteriorly
ii. midline point for diaphragmatic surface of liver, diaphragm and inferior border of heart
d. Linea alba attaches to this portion of the sternum
Examine the shaded xiphoid process in the image below and then move on to next page. Tap image to toggle shading if desired.