| A | B |
|---|
| Mammary Gland | Gland in female mammals that produces milk to nourish the young |
| Monotreme | Egg-laying mammal that belongs to the order Monotremata |
| Marsupial | Nonplacental mammal in thich the fetus is born at a very immature stage and completes its development in a pouch |
| Placental Mammal | Mammal in which a placenta forms during development of the embryo |
| Cecum | Long sac that forms part of the intestine of some herbivores |
| Rumen | Chamber in the digestive tractof some herbivores animals that contains symbiotic bacteria thatproduces enzymes neededto break down cellulose |
| Marsupium | Pouch in marsupials where the youngs embryo completely develops |
| Placenta | Organ in placental mammals through which nutrients, oxygen,carbon dioxide, and wastes are exchanged between embryo and mother |
| Prehensile Trail | Tail found in New World monkeys that is used for grasping while climbing |
