1. The Digestive System

2. Functions of the digestive system
Ingestion
Mechanical processing
Digestion
Secretion
Absorption
Excretion

3. Steps in Digestion Mouth – Crushing and grinding
Stomach – Chemical Breakdown
Small Intestine – Useful material extracted
Colon – Water removal

4. Digestive Organ’s Functions
Salivary Gland
There are three main glands that deliver saliva to soften the food
Epiglottis
This is a trap door that covers the trachea to prevent food and fluids from draining into the lungs
Esophagus
This is a muscular tube that takes the food to the stomach. The contractions are called PERISTALSIS
Stomach
This is where the food goes and gets melted into a thick soup by the GASTIC ACIDS

5. It has three parts, duodenum, jejunum and ileum.
Digestive Organ’s Functions cont.
Small Intestine
It has three parts, duodenum, jejunum and ileum.
Duodenum
Is responsible cor continuing to break down of food
Jejunum
Absorbing nutrients into the blood stream
Iluem

6. The body’s sugar control board. Produces insulin and glucagon
Digestive Organ’s Functions cont.
Pancreas
The body’s sugar control board. Produces insulin and glucagon
Liver
Food doesn’t pass through this organ, instead the liver secretes bile
Gall Bladder
Stores bile from the liver and releases bile into the duodenum
Appendix
We do not need our appendix, sometimes a piece of food gets stuck in here and causes an infection.

7. Part of the colon, used to store waste for disposal.
Digestive Organ’s Functions cont.
Large Intestine
Also known as the colon. It has three major parts, ascending colon, transverse colon and descending colon.
Rectum
Part of the colon, used to store waste for disposal.
Gall Bladder
Stores bile from the liver and releases bile into the duodenum

8. Salivary Gland
Teeth
Tongue
Epiglottis
Esophagus
Liver
Stomach
Gall Bladder
Bile Duct
Duodenum
Pancreas
Transverse Colon
Ascending Colon
Small Intestine
Descending colon
Appendix
Rectum