Term Name:	pectoral muscle
Synonyms:	breast muscle, M. pectoralis, muscle of pectoral part of chest, muscle of pectoral region, pectoralis, pectoralis group muscle, pectoralis muscle
Definition:	Muscles of the upper chest. The term may refer to one of two muscles, the pectoralis major and pectoralis minor. The former is a thick muscle in the anterior portion of the chest. Its action involves flexion, medial rotation, and adduction of the humerus. The latter is a thin muscle located beneath the pectoralis major. Its action involves lowering the scapula and raising the ribs.
Ontology:	Cell Ontology [UBERON:0001495]