| A | B |
|---|
| warmblooded | constant body temperature |
| flight feathers | feathers that help birds move |
| vane | flat part of a feather,thread like structure |
| rachis | shaft,support vane |
| quill | bottom section attached to the skin of a bird |
| pigment | coloring matter in cells and tissues |
| cloaca | an opening in the intestines where waste leaves a bird |
| herbivores | plant eatting animal |
| carnivores | flesh eatting animals |
| omnivores | eat both flesh and plants |
| oviduct | tube where egg passes |
| testes | male reproductive organ |
| albumen | white part of egg that serves as food to new bird |
| incubation | keeping eggs warm until hatched |
| mammal | an animal with hair and mammary glands that produce milk |
| monotremes | a mammal that lays eggs |
| marsupials | mammals with pouches |
| placental | mammals that have young develope inside their body |
| placenta | organ that attaches unborn to mother |
| zygote | an egg fertilized by sperm |
| uterus | organ that houses unborn |
| gestation | time when unborn is developed |
| embryo | a growing zygote |
| pregnancy | period of gestation |
| cerebrum | largest part of brain that provides intelligence |
| mammary glands | glands in mammals that produce milk for young |
