06-02-06-02-20112011 Warm-Up

1) List all the organs you know.

2) List all the functions you can of the organs you listed.

Evolution Projects Due Tomorrow!Evolution Projects Due Tomorrow!

Fast FactsFast Facts

Taking Notes….Taking Notes….

- Fill in the organ functions as we goFill in the organ functions as we go

- Write down any other interesting Write down any other interesting facts you learnfacts you learn

- ? Next to things you don’t ? Next to things you don’t understandunderstand

- * things you think are interesting* things you think are interesting

The Digestive SystemThe Digestive System

Copy the table in your notebookCopy the table in your notebookTape in the diagramTape in the diagram

How is food digested?How is food digested?

Digestion involves -Digestion involves -

Breaking down of food into smaller Breaking down of food into smaller piecespieces

The mixing of foodThe mixing of food Movement through the digestive tractMovement through the digestive tract Chemical breakdown of the large Chemical breakdown of the large

molecules of food into smaller molecules of food into smaller molecules. molecules.

MouthMouth

Main function Main function = break apart food = break apart food using teeth and saliva so food is moist using teeth and saliva so food is moist and carbohydrates can be digestedand carbohydrates can be digested

EsophagusEsophagus

It moves food by waves It moves food by waves of muscle contraction of muscle contraction from the mouth to the from the mouth to the stomach.stomach.

StomachStomach

The stomach has The stomach has thick muscles thick muscles in its wall in its wall which contract to mash the food into a which contract to mash the food into a water soup called chyme. water soup called chyme.

The stomach lining produces strong The stomach lining produces strong digestive juices (like HCL) which break down digestive juices (like HCL) which break down and dissolve nutrients. and dissolve nutrients.

Small Small IntestineIntestine

Nutrients are broken Nutrients are broken down down small enough to small enough to pass through the liningpass through the lining of the small intestine, of the small intestine, and and into the bloodinto the blood (diffusion). (diffusion).

Nutrients are carried Nutrients are carried away to other body away to other body parts to be processed, parts to be processed, stored and distributed.stored and distributed.

Factoid = 20 feet long Factoid = 20 feet long

Large IntestineLarge Intestine Absorbs Absorbs water and water and body minerals through body minerals through the walls of the large the walls of the large intestine, back into the intestine, back into the blood. blood.

The remains are The remains are formed into brown, formed into brown, semi-solid feces, ready semi-solid feces, ready to be removed from to be removed from the body the body

Rectum and AnusRectum and Anus(yes, we’re talking about butts)(yes, we’re talking about butts)

The end of the large The end of the large intestine and the next part intestine and the next part of the tract, of the tract, the rectumthe rectum, , store the feces. store the feces.

Feces are finally squeezed Feces are finally squeezed through a ring of muscle, through a ring of muscle, the anus, the anus, and out of the and out of the body.body.

PancreasPancreas

Makes digestive juices called enzymes Makes digestive juices called enzymes which help to digest food when which help to digest food when emptied into the small intestines. emptied into the small intestines.

Gall BladderGall Bladder

A small baglike part under the liver.A small baglike part under the liver.

Main Function: Main Function: It stores a fluid called It stores a fluid called bile which flows into the intestines to bile which flows into the intestines to help digest fatty foods.help digest fatty foods.

LiverLiverThe liver is like a food-The liver is like a food-processing factory with processing factory with more than 200 different more than 200 different jobs.jobs.

M.F =It M.F =It storesstores some some nutrientsnutrients, , changes them changes them from one form to another, from one form to another, and and releases them releases them into into the blood the blood according to according to the activities and needs the activities and needs of the body.of the body.

Did you get them all?Identify the organs of the Identify the organs of the

digestive systemdigestive system

Describe the digestive Describe the digestive systemsystem

The digestive tract is a series of The digestive tract is a series of hollow organs joined in a tube hollow organs joined in a tube from the mouth to the anus. from the mouth to the anus.

Food passes through the Food passes through the digestive tract.digestive tract.

Helpful organs include the liver, Helpful organs include the liver, gall bladder, and pancreas. gall bladder, and pancreas. Food does not pass through Food does not pass through these organs but they help the these organs but they help the process.process.

(Can someone summarize this (Can someone summarize this page?)page?)

Digestive system is one long tube that moves and breaks down our food.

06-03-201106-03-2011

Warm-UpWarm-Up

Magic School Bus For Lunch

http://www.youtube.com/

watch?v=r8O8ywW2fV4

For more information For more information about the digestive about the digestive system, click here:system, click here:

http://kidshealth.org/kid/body/digest_noSW.html

To quiz yourself over the To quiz yourself over the parts of the digestive parts of the digestive

system, click here:system, click here:

http://www.tvdsb.on.ca/westmin/science/sbi3a1/digest/digdiag.htm