2. Tympanum Difference Between Sexes
Female
Top
Male
Bottom

5. Parts of the Digestive System
1. Esophagus: Tube that leads to the stomach 2. Stomach: First site of chemical digestion, breaks down food 3. Liver: Makes bile (aids in digestion) 4. Gall bladder: Stores bile 5. Pancreas: Makes insulin (aids in digestion) 6.Small Intestine (duodenum and ileum): absorb nutrients from food 7. Mesentery: Holds coils of the small intestine together 8. Large Intestine: Collects waste, absorbs water 9. Cloaca: Where sperm, eggs, urine, and feces exit.

10. Parts of the Circulatory System
1. Artery take blood away from the heart 2. Vein: take blood toward the heart 3. left atrium receives blood that then flows into the ventricle 4. Right atrium receives blood that then flows into the ventricle
5. Ventricle pumps blood to the body 6. Lung: organ for oxygen and carbon dioxide exchange 
7. Spleen: Part of circulatory system, stores blood

14. Male / Female

15. Oviduct

25. The gastric-brooding frog.
These animals reproduce by the female swallowing the fertilized eggs and keeping them in her stomach until the young emerge as fully formed frogs.
Acid production in the female’s stomach stops, and her entire digestive system shuts down, converting it from a means of sustenance into a brood pouch.
After the appropriate developmental period, (40 days) the little frogs, about 21 to 26 of them, come out of their mother’s mouth as fully formed and ready for action