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Thechest is the front part of thetorso. It is between theneck andabdomen.
Inmammals, the parts that make up the thorax are thesternum, the thoracicvertebrae and theribs. It starts from theneck and stops at thediaphragm.
Women develop breasts on the chest during puberty, while male chests generally remain flat, while gaining muscle and many men grow chest hair. However, excess fat in men can contribute to gynocomestia, which leads to breast development in men.
Ininsects andcrustaceans, it is the middle of the three main body sections. The walkinglegs are usually on the thorax.
