cloaca (zoology) the cavity (in birds, reptiles, amphibians, most fish, and monotremes but not mammals) at the end of the digestive tract into which the intestinal, genital, and urinary tracts open
vestibule any of various bodily cavities leading to another cavity (as of the ear or vagina)
mediastinum the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymus
pericardial cavity,
pericardial space the space between the layers of the pericardium that contains fluid that lubricates the membrane surfaces and allows easy heart movement
vacuole a tiny cavity filled with fluid in the cytoplasm of a cell
ventricle a chamber of the heart that receives blood from an atrium and pumps it to the arteries
chest cavity,
thoracic cavity the cavity in the vertebrate body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart
abdominal cavity,
abdomen the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm
renal pelvis,
pelvis a structure shaped like a funnel in the outlet of the kidney into which urine is discharged before passing into the ureter
pelvic cavity the space bounded by the bones of the pelvis and containing the pelvic viscera
celom,
celoma,
coelom a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity
