Anatomy/Digestive System
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[edit] Overview
[edit] Mouth
The mouth, also known as the buccal cavity or the oral cavity, is the orifice through which an animal takes in food and water.
Chewing is the first step in digestion:
- Lips
- Teeth (Incisors, Bicuspids, Molars, et.)
- Jaw (Mandible)
- Hard Palate/ Soft Palate
- Saliva (contains enzymes that help breakdown the food)
- Pharynx
Most animals have a complete digestive system, with a mouth at one end and an anus at the other. Which end forms first in ontogeny is a criterion used to classify animals into protostome and deuterostome. In arthropods, they are external modified legs; in gnathostomata vertebrates they are internal.
[edit] Oesophagus
Made of three different types of muscle
[edit] Stomach
- Cardiac region
- Fundus
- Body
- Pylorus
- Cardiac Sphincter
- Pyloric Sphincter
[edit] Small Intestine
- Duodenum
- Jejunum
- Ileum
[edit] Liver
- Produces bile
[edit] Gall Bladder
- Stores bile (helps breakdown the food even further once it reaches the intestines.
People with surgically removed Gall Bladders must take medication that replicates the function of the bile.
[edit] Pancreas
pancreas makes pancreatic juices
[edit] Large Intestine
- Cecum
- Colon
- Rectum
