digestive+notes-+rebecca

__//**digestive system**//__

1.begins in the mouth - tube is about 20 feet. - tube is made of cells. In the mouth the food is chewed up. - you break up the food. - this is mechanical. - sugar dissolves and absorbed in our mouth.

Food goes down the tube, and enters the stomach. - there is acid in your stomach. - the acid and stomach start to digest your food. - food is not small enough to be absorbed by your cells. - protein can be digested in your stomach. - trying to get in into small pieces.

Then the food goes into your small intestine. - break food down into small enough pieces so that it can cross a cell. - small intestine can reach over the area of a tennis court.

Then the food goes into the large intestine, - the food that you don't want is left in the large intestine. - there are bacteria that eat the food that you don't digest. - you cant digest fiber- plant walls. - water is absorbed in the large intestine. -You have diarrhea when your water didn't get absorbed.

food takes about a minute to get down into your stomach. food stays about 2 hours in your stomach. then its in the small intestine for the next 4 hours. then it just sits in the large intestine- and the food hardens. then

it takes about 33 hours for your food to go all the way through.