Thorax

In mammals, the parts that make up the thorax are the sternum, the thoracic vertebrae and the ribs. It starts from the neck and stops at the diaphragm.

Thorax Chest
X-ray image of the human chest showing the internal anatomy of the rib cage, lungs and heart as well as the inferior thoracic border–made up of the diaphragm.
Surface projections of the organs of the trunk, with the thorax or chest region seen stretching down to approximately the end of the oblique lung fissure anteriorly, but more deeply its lower limit rather corresponds to the upper border of the liver.
Details
Identifiers
Latin	thorax
Greek	θώραξ
MeSH	D013909
TA	A01.1.00.014
FMA	9576
Anatomical terminology

In this insect diagram, the thorax is the section labelled B, between the head and the abdomen.

The thorax is a part of an animal's body that is between the head and the abdomen.

In insects and crustaceans, it is the middle of the three main body sections. The walking legs are usually on the thorax.

• Chest
• Thoriac