| Flap 1 | Flap 2 |
| the body cavity which contains the digestive, urinary, and internal reproductive organs; also called abdominopelvic cavity | abdominal cavity |
| the killing of an unborn child | abortion |
| the digestive tube that runs from the mouth to the anus | alimentary canal |
| the sac of fluid that surrounds and protects a human or mammal during devleopment in the womb | amniotic sac |
| the body cavity which contains the brain | cranial cavity |
| a gland that secretes hormones into the blood | endocrine glands |
| in humans and in animals which bear live young, the prenatal period of development | gestation |
| chemicals produced by living things to control or stimulate specific internal processes; chemical messengers | hormones |
| the tissues fluid that fills the spaces between cells and tissues | interstitial fluid |
| in humans and placental mammals, the structure in the wall of the uterus by means of which the developing offspring receives nourishment and eliminates wastes | placenta |
| the body cavity which contains the spinal cord | spinal cavity |
| in humans and placental animals, the bundle of blood vessels that attaches the baby to the mother's placenta | umbilical cord |
| the body cavity which contains the heart and lungs | thoracic cavity |
| a group of similar cells which work together to accomplish the task of an organ | tissue |
| in mammals and man, the muscular organ of the female reproductive system in which the young are nourished until birth; also called the womb | uterus |
| any of the 180 or so organs once assumed by evolutionists to be useless traces of man's supposed evolutionary past | vestigial organ |
| pertaining to the soft, internal | visceral organs |
