1. The digestive system

2. Learning goals We are learning the organs of the digestive system.
We are learning the functions of the digestive system.
We are learning the difference between diffusion and osmosis.

3. What is it?
essentially a tube that extends from the mouth to the anus

4. Basic functions ingestion digestion
absorption of nutrients (#1 function!!!)
elimination of solid wastes

5. Absorption
process by which food that has already been broken down passes through the walls of the intestine into the bloodstream.
takes place mainly in the small intestine.

6. parts mouth (physical and chemical dig)
esophagus (movement of food via peristalsis)
stomach (physical digestion via churning and chemical digestion via enzymes and acid)
pancreas (secretes insulin and enzymes into intestines)
gall bladder (stores bile)
liver (secretes bile which breaks up fats)
intestines (absorbs nutrients and water)
rectum/anus (stores waste to be excreted)

7. The Digestive System Esophagus Liver Stomach Pancreas Gall Bladder
Large Intestine
(colon)
Small Intestine
Rectum

8. Diffusion Process by which important chemicals enter our cells.
A natural process by which, chemicals move from an area of high concentration (density) to low.

9. Osmosis Process by which water flows inside a cell.
Water will flow to the area of high solute (dissolved material) concentration to try and equalize the concentration.

10. Osmosis Concentrations
Equal amount of water inside /
outside of cell.
Too little water inside cell
Too much water inside cell

11. Learning goals We are learning the organs of the digestive system.
We are learning the functions of the digestive system.
We are learning the difference between diffusion and osmosis.