Digestive System- homework help?! Anyone?!?I have a project due tomorrow (what else is new) and i'd really really really appreciate if anyone wanted to share any of their knowledge regarding the human digestive system under any of the following:
structure and function of all parts of system levels of organization
homeostasis; how does the system maintian equilibrium
growth and development
diseases,cancer,and disorders, genetic or other types of causes
medical breakthroughs- surgeries,therapies,replacements
medical prevention/medicines, therapies
how drugs interact with function of system
intresting factsmust have 3
ps, if anyone has any good websites for free animated clipart feel free to share as well -- my teacher's a sucker for little moving pictures on our powerpoints.
Posted by 8 ball
go to for structure and function
http://en.wikipedia.org/wiki/Digestive_System
for info on all ur sub heading go to-
http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd/
Posted by mal
I have a couple awesome (I think) interesting facts for yo\
1)The human gut contains more microbial cells than a human has her/his own cells in their entire body!
2) These microbes have recently been estimated to account for 8-10% of our nutritional intake, by metabolizing foods we cannot (such as cellulose from plants).
Posted by amber
interesting facts:
you have so many bacteria in your intestines that they weigh about 3 pounds
the bacteria in your intestines make most of your daily needs of vitamin K
medical prevention/therapies (drugs):
-Sucralfate - helps to heal an ulcer
-Proton Pump Inhibitors (PPI's) - decrease gastric acid production, eg - prilosec, nexium, protonix, aciphex, prevacid
-H2 Blockers - decrease gastric acid production, eg - ranitidine, cimetidine, nizatidine
PPI's and H2 Blockers can help w/GERD and acid reflux disease, also help w/ulcers
maybe check out diseases like Cystic Fibrosis and Crohn's Disease
hope this helps
Posted by chvet5
Mouth- mechanical digestion and chemical digestion through the use of amylase (starch enzyme)
Esophogus-peristalses to push food into stomach
Stomach-churning of food and pepsin to break down proteins
pancreas- provides enzymes to break down food in sm. Intestine
Sm Int-has villi to increase surface area it also breaks down proteins, starches, and fats
large intestine- absorption of water mineral and vitamins
liver-bile production
Gall Bladder- storing of bile and secretion of bile into the sm intestine
Basically all this is to increase surface area to better absorption of materials into the body
Posted by filbert hita kumaro
The digestive system is mainly used to digest food substances intake for the work to be done by all of the body parts. The gut is about 8 metres long. In mouth, the teeth digest mechanically and tear food to pieces. The saliva contains amylase, an enzyme to break down starch to maltose. The food that is already mixed with saliva is called bolus of food. The food is then pass through the oesophagus. The whole digestive system contains mucus to slide through and peristalsis, a movement that will move the food materials to the next organs. After oesophagus, the food is stored in stomach. Before hand, the sphincter muscle will close soon after the food reach stomach, to prevent flow back. However, sometimes, due to different conditions, people vomit up again. The stomach contains 'good bacteria' that can kill bacteria, HCl (acid) to kill bacteria also and maintain pepsin, a protease that can break protein to polypeptides with optimum pH around 2. If there is alcohol within the food, alcohol will be absorbed directly HERE! Alcohol is dangerous since it slows down the body reactions. Alcohol will finally be broken down in liver (If too much may give cirrhosis) The food will go down to duodenum after around 2-3 hours inside the stomach. The duodenum is connected to the heart and pancreas, in which the heart produces bile, which break fats mechanically further, and pancreas produces many other enzymes like amylase, maltase, trypsin, etc. and also sodium hydrogencarbonate, which is alkaline in nature and neutralise the acidity from HCl. The digested food molecules, mainly are amino acids, glucose, fatty acids and glycerol, are absorbed in the ileum's wall (It is called villi which are tiny projections; it contains lacteal that leads to the lymphatic system and blood capillaries that leads to the hepatic portal vein and leads to the liver*. Then, the undigested materials and water are passed to the large intestine. Along the large intestine there are 'things' called as caecum and appendix**. In human, these things' uses haven't been found, but in herbivores such as goat, these things are used to digest the roughage (fibres). Let's proceed. The undigested food was passed to the colon, then rectum (both are part of large intestine). Colon will absorb water. Rectum will store the remaining. From rectum, the faeces will be passed out through rectum when you are going to toilet.
*In liver, the glucose will be distributed to parts of the body to respire (releasing energy). If there is excess, Islets of Langerhans will release hormones called insulin which converts them into glycogen as a storage. If there is shortage, Islets of Langerhans will release hormones called glucagon which will break glycogen to glucose. The amino acids will be used accordingly for growth, repairing worn-out cells, etc. The excess will be broken down in liver as glucose and nitrogen. This nitrogen is then reacting with carbon dioxide and other waste products to form ammonia. Then, ammonia is passed away as the 'blue flame' or what you called as 'fart'.
**Appendix has a disease as well. I forgot the name. The cause is too much of seeds from chilly and other fruits stuck in appendix. To prevent, simply remove seeds from chilly, tomato, etc. The medical cure is by surgery in which the appendix is cut.
Orignal From: Digestive System- homework help?! Anyone?!?
Post a Comment