Digestion and respiration systems, anatomy and physiology

Nutrition process:
1º . We obtain nutrients from the digestive system and oxygen form the respiratory system.
2º . In this phase, we use the circulatory system.
3º . We have to eliminate waste products, via the excretory system and sweat glands and carbon dioxide via the respiratory system.

Accessory glands into the .

stops food from entering the respiratory system.
and are the 2 sphincters that the stomach has.
The are the small ducts of the liver that collect its bile.
pear-shaped.
The small intestine is divided into 3 parts: the , and .
This part of the digestive system doesn't have villi, instead, it has lubricating mucus. .