Thorax

The thorax (pl.: thoraces or thoraxes) or chest is a part of the <a href="/facts/Anatomy/p8TCWJuV">anatomy</a> of mammals and other <a href="/facts/Tetrapod/vWpAxzAW">tetrapod</a> animals located between the <a href="/facts/Neck/v69tnMYk">neck</a> and the <a href="/facts/Abdomen/HcTzDFL0">abdomen</a>.
In <a href="/facts/Insect/IgDNvnUL">insects</a>, <a href="/facts/Crustacean/PBobIVJP">crustaceans</a>, and the extinct <a href="/facts/Trilobite/Tk8ppaKc">trilobites</a>, the thorax is one of the three main <a href="/facts/Tagma_(biology)/ElNc6GUo">divisions</a> of the body, each in turn composed of multiple segments.
The human thorax includes the <a href="/facts/Thoracic_cavity/4N5W74rF">thoracic cavity</a> and the <a href="/facts/Thoracic_wall/Eg89Q7zl">thoracic wall</a>. It contains organs including the <a href="/facts/Heart/fF4KSGdk">heart</a>, <a href="/facts/Lungs/gTWXI6Fj">lungs</a>, and <a href="/facts/Thymus/YYEJu7KA">thymus</a> gland, as well as muscles and various other internal structures. Many diseases may affect the chest, and one of the most common symptoms is <a href="/facts/Chest_pain/QFUzPBsT">chest pain</a>.

Thorax open-in-new

Thorax