| A | B |
|---|
| vertebral column | backbone,which encloses and protects the nerve cord |
| jawless fish | fish that lacks a jaw |
| bony fish | fish whose skeleton is made up of bone-class Osteichthyes |
| cartilaginous fish | fish whose skeleton is soft (not bone)-Chondrichthyes |
| atrium | chamber of the heart that receives incoming blood |
| ventricle | muscular chamber that pumps blood out of the heart |
| aorta | large artery in mammals that carries oxygen rich blood from left ventricle of the heart to all parts except lungs |
| olfactory bulb | most anterior part of a fish's/ amphibian's brain |
| cerebrum | part of the brain responsible for all voluntary activities in the body; largest part of the brain |
| optic lobe | part of the brain that processes information from the eyes |
| cerebellum | part of the brain that coordinates and balances the actions of muscules |
| medulla | part of the brain that controls internal organ functions and maintains balance |
| oviparous | description of species that lay eggs that develop outside the mother's body |
| ovoviviparous- | des. of species whose young develop inside the mother's body |
| viviparous | species that bears livingyoung and in which the unborn young are directly nourished by mother |
