The chest (Greek: θώραξ, Latin: thorax) is a part of the anatomy of humans and various other animals. It is sometimes referred to as the thorax.

In hominids, the chest is the region of the body between the neck and the abdomen, along with its internal organs and other contents. It is mostly protected and supported by the ribcage, spine, and shoulder girdle. Contents of the chest include the following:

*organs
heart
lungs
Thymus
*muscles
trapezius muscles and neck
*internal structures
diaphragm
esophagus
trachea
xiphoid process
*arteries and veins
aorta
superior vena cava
inferior vena cava
pulmonary artery
*bones
the shoulder socket containing the upper part of the humerus
scapula
sternum
thoracic portion of the spine
collarbone
ribcage
Floating ribs
*external structures
nipples
mammary glands
The V of the chest is the area exposed by open-necked shirts.
*thoracic abdomen (stomach, kidney/adrenal, pancreas, spleen, and lower oesophagus)

In humans, the portion of the chest protected by the ribcage is also called the thorax.