thorax morphology trait thoracic cavity morphology trait Trait.ontology 2010-02-10T03:32:14Z smb VT:0015045 Any measurable or observable characteristic related to the shape, structure, color or pattern of the cavity in the vertebrate body enclosed by the ribcage between the diaphragm and the neck, and contains the lungs, heart, thoracic aorta, pulmonary artery and its branches, thymus gland, and the respiratory airway.