1. Digestive System
1st Hour Team Georgina

2. Include the following on your slide:
Name of organ
Description of structure
Function of organ
Identify if there is mechanical &/or chemical digestion occuring
Picture of the organ
Identify any secretions produced
Function of secretions
Use only 1 slide. Make sure it is neat & easy to read.

3. Mouth Hollow with teeth, a tongue, and lips
Aids in digestion physically and chemically
Teeth mechanically break food down while saliva and
Identify any secretions produced
Function of secretions

4. Pharynx behind mouth and nasal cavity, above esophagus
Help push food to esophagus and prevent air from being swallowed
No mechanical or chemical digestion occurring
No secretions except mucus

5. Esophagus Connects the thoart (pharynx) and the stomach
Made of muscles that contract to move food to the stomach
It is like a highway for food and drink to travel along to make it to the stomach
mechanical digestion
Mucus secretion

6. Stomach
Ridges of muscle tissue called rugae line it, rounded hollow organ, located inferior to diaphragm
Pyloric sphinicter is a muscular valve that opens to allow food to pass to the small intestine
Function: breakdown and digest food to extract nutrients
Both chemical and mechanical digestion! The stomach churns the food and the food mixes with acids and enzymes
Secretion: pepsin, acid, and gastric juices. The pepsin breaks down proteins.
Some stomach cells produce intrinsic factor a substance needed for the absorption of Vitamin b 12

7. Small Intestine Long and narrow tube; 23 feet long when stretched
90% of digestion and absorption of minerals and nutrients
Chemical digestion -- acids break food down
Digestive enzymes secreted by pancreas and liver
Secretin (hormone) neutralizes potentially harmful acid from stomach

8. Large intestine
A shorter and wider tube than the small intestine; approximately 5 feet long and 3 inches in diameter.
absorption of fluids and the formation of faeces.
Chemical digestion; no digestive enzymes are produced and the absorption of water and electrolytes.The elimination of feces is another function.
There are no secretions in the large intestine. Just mucus which helps lubricate and form fecal matter.

9. Liver Liver is made up of four lobes Produces bile Secretes bile
Bile breaks down large fat globules into smaller ones
Bile is responsible for chemical digestion of fat
No chemical or mechanical digestion actually occurs in the liver

10. Pancreas Has two main ducts
Exocrine function helps with digestion and endocrine function helps regulate blood sugar
Chemical digestion-produces enzymes that breakdown all foods

11. Gallbladder Small pouch under the liver
Stores bile produced by the liver
Part of chemical digestion
Bile is released into the small intestine to help digest fats

12. Salivary Glands
There are three types of salivary glands: parotid glands (Anterior to the ears), submandibular glands(beneath the lower jaws), and the sublingual glands (beneath the tongue).
The salivary glands produce saliva which is a mixture of mucous and serous fluids. In saliva there is an enzyme, salivary amylase
Chemical digestion takes place because the saliva produced has salivary amylase that breaks down starch into glucose.
Saliva also contains substances such as lysozyme and antibodies that inhibit bacteria

13. Function: breakdown and digest food to extract nutrients
Both chemical and mechanical digestion! The stomach churns the food and the food mixes with acids and enzymes
Secretion: pepsin, acid, and gastric juices. The pepsin breaks down proteins.