| A | B |
|---|
| Order Anura | Frogs and Toads |
| Tadpoles | Swimming, tailed larva. |
| Order Urodela | Salamanders |
| Order Apoda | Caecillians |
| Mucous glands | Produce a lubricant that keeps the skin moist in air. |
| Pulmonary circulation | Carries deoxygenated blood from the heart to the lungs and then returns the oxygenated blood to the heart. |
| Systematic circulation | Carries oxygenated blood from the heart to the muscles and organs of the body and brings deoxygenated blood back to the heart. |
| Pulmonary respiration | Respiration through the lungs. |
| Cutaneous respiration | Respiration through the skin. |
| Duodenum | The upper portion of the small intestine. |
| Ileum | The coiled middle part of the small intestine. |
| Mesentery | A membrane that holds the small intestine in place. |
| Vent | Where waste exits the body. |
| Nictitating membrane | A transparent moveable membrane. |
| Tympanic membrane | Eardrum |
| Columella | A small bone that extends between the tympanic membrane and the inner ear. |
| Amplexus | When the male clings to the female during mating. |
