| A | B |
|---|
| mammary gland | the feature for whch mammals are named produce milk to nourish the young |
| subcutaneous fat | which is a layer of fat located beneath the skin also helps conserve body heat |
| rumen | in which newly swallowed plant food is stored and processed |
| diaphragm | pulls the bottom of the chest cavity downward, which further increases its volume |
| cerebral cortex | which is the center of thinking and other coplex behaviors |
| binocular vision | the ability to merge visial images from both eyes, thereby providing depth perception and a theree-dimensional view of the world |
| prosimian | today are small, nocturnal primates with large eyes that are adapted to seeing in the dark |
| anthropoid | which means humanlike primates |
| prehensile | tail is a tail that can oil tightly enough around a branch to serve as a fifth hand |
| hominoid | include gibbons, orangutans, gorillas, chimpazees, and humans |
| hominid | family, which includes modern humans, displayed several distinct evolutionary trends |
| bipedal | or two-foot, locomotion was very important, because it freed both hands to use tools |
| oppsosable thumb | meanwhile, the hominid hand evolved |
