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 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.
In insects and crustaceans, it is the middle of the three main body sections. The walking legs are usually on the thorax.
Images for kids
An X-ray of a human chest area, with some structures labeled
Volume rendering of a high resolution computed tomography of the thorax. The anterior thoracic wall, the airways and the pulmonary vessels anterior to the root of the lung have been digitally removed in order to visualize the different levels of the pulmonary circulation.
Clearly visible thorax of an artistic gymnast.