Human Body Systems

Lesson 7 Terms and Definitions

PART 2

Q: What happens to the leftover food that is

not absorbed into the bloodstream?

Large Intestines!!

• Colon and Large Intestines are esentially the same thing

• Enters as liquid blob

• Water is absorbed into bloodstream, leaving a more solid feces.

http://coloncancer.about.com/od/glossaries/g/Large_Intestine.htmIllustration by Donna Myers

Feces

• Feces is composed of water, undigested food, mucus, dead cells, and bacteria.

• Feces are eliminated through the anus.

Back to the LI

• Importance of LI…– Water and minerals pass back into

bloodstream.

• Seems kind of …

http://www.kidactivities.net/image.axd?picture=2009%2F7%2Fbored+kid.jpg

Boring!

I mean what could go wrong?

Diarrhea!!!!

• Food moves through LI too fast.

• Water is not absorbed into the bloodstream.

• Potential DANGER …. Dehydration (loss of water)

http://img.timeinc.net/time/daily/2007/0706/a_ldisgust_0604.jpg

Constipation

• Food moves to SLOWLY through LI.

• Feces become larger, harder, drier.

• How to fix…– Laxative – causes peristalsis contractions to

increase!

• How to avoid…– High FIBER diet

http://2.bp.blogspot.com/_GY69sDkG2Us/SyKBHN69ZrI/AAAAAAAACPc/j0fYMFXqop4/s400/disgust.jpg

Rectum and out!

• Rectum – last stop in the LI. – Food gathers together– Powerful contractions and feces are released.

• And down it goes in a swirling wonder!

http://www.thegreenestdollar.com/wp-content/uploads/2009/02/13campsite-outhouse.gif