Tubercle (rib)
Encyclopedia
The tubercle of a rib
is an eminence on the posterior surface, at the junction of the neck
and body of the rib
, and nearer the lower than the upper border.
It consists of an articular and a non-articular portion.
Rib
In vertebrate anatomy, ribs are the long curved bones which form the rib cage. In most vertebrates, ribs surround the chest, enabling the lungs to expand and thus facilitate breathing by expanding the chest cavity. They serve to protect the lungs, heart, and other internal organs of the thorax...
is an eminence on the posterior surface, at the junction of the neck
Neck of rib
The neck of the rib is the flattened portion which extends laterally from the head; it is about 2.5 cm. long, and is placed in front of the transverse process of the lower of the two vertebræ with which the head articulates....
and body of the rib
Rib
In vertebrate anatomy, ribs are the long curved bones which form the rib cage. In most vertebrates, ribs surround the chest, enabling the lungs to expand and thus facilitate breathing by expanding the chest cavity. They serve to protect the lungs, heart, and other internal organs of the thorax...
, and nearer the lower than the upper border.
It consists of an articular and a non-articular portion.
- The articular portion, the lower and more medial of the two, presents a small, oval surface for articulation with the end of the transverse process of the lower of the two vertebrae to which the head is connected.
- The non-articular portion is a rough elevation, and affords attachment to the ligament of the tubercle. The tubercle is much more prominent in the upper than in the lower ribs.