| A | B |
|---|
| mucus | lubricates and aids in movement |
| chromatophores | cells producing coloration |
| guanine crystals | excretory porducts that relfect light |
| cammouflage | protects and hides from predators |
| scales | can count rings on these for fish's age |
| digestive | use of food |
| respiratory | gas exchange |
| circulatory | transport oxygen, waste, nutrients |
| excretory | gets rid of cellular wastes |
| endocrine | glands produce secretions |
| nervous | most highly developed system |
| reproductive | insure species preservation |
| immune | for body defense |
| inborn behavior | inherited, instincts |
| learned behavior | non-inherited, flexible |
