Ministry of High Education
Almajmaa University
College of Medicine
Digestive System
Your digestive system is turn the food you eat into
energy your body needs to survive
The organ of digest...
mouth :
 The mouth is the beginning of
the digestive tract .
 Chewing and breaks the food
into pieces that are more easi...
Esophagus :
The esophagus is a
muscular tube extending
from the pharynx to the
stomach .
 By means of a series of
contra...
Stomach :
• The stomach is a sac-like
organ with strong muscular
walls
• In addition to holding the
food, it's also a mixe...
Small intestine :
 Made up of three parts :
duodenum, jejunum, and

ileum .
 the small intestine is a long
tube loosely ...
• Large intestine : The
large intestine (colon) is
the last part of the
digestive system.
• Its function is to absorb
wate...
Pancreas : Among other functions,

the pancreas secretes enzymes
into the small intestine. These
enzymes break down protei...
 Gallbladder : The
gallbladder is a pear-shaped
reservoir that sits just under
the liver and stores bile.
 Bile is made ...
What is gastro-intestinal hormones ?
• The GI hormones are secreted by epithelial
cells lining the lumen of the stomach an...
Hormones

source

function

Gastrin

secreted by the
mucous lining of the
stomach

the secretion of gastric
acid is stimul...
summary
The digestive system is one of the most
important system in the body, the organ of the
GI system digest the food ...
Questions ?
Resources
• GUYTON AND HALL textbook of Medical
physiology .
• Medicine books web site.
Thank you
Don by : Mohammed Abdullah Hazazi
2nd year medical student
Supervisor : DR. Kamran Afzal
Assistant Professor of ...
digestion
digestion
digestion
Upcoming SlideShare
Loading in...5
×

digestion

441

Published on

list the general function of various parts of GI system .

list gastro-intestinal hormones , identify their source and list one function of each .

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
441
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
23
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

digestion

  1. 1. Ministry of High Education Almajmaa University College of Medicine
  2. 2. Digestive System Your digestive system is turn the food you eat into energy your body needs to survive The organ of digestive system are : Mouth Throat Esophagus Small Intestine Large intestine Pancreas Liver Gallbladder
  3. 3. mouth :  The mouth is the beginning of the digestive tract .  Chewing and breaks the food into pieces that are more easily digested. Throat :  Also called the pharynx  the throat is the next site for food you've eaten. From here, food travels to the esophagus .
  4. 4. Esophagus : The esophagus is a muscular tube extending from the pharynx to the stomach .  By means of a series of contractions, called peristalsis the esophagus delivers food to the stomach .
  5. 5. Stomach : • The stomach is a sac-like organ with strong muscular walls • In addition to holding the food, it's also a mixer and grinder . • The stomach secretes acid and powerful enzymes that continue the process of breaking down the food. • When the food leave the stomach it is look like liquid or paste .
  6. 6. Small intestine :  Made up of three parts : duodenum, jejunum, and ileum .  the small intestine is a long tube loosely coiled in the abdomen The small intestine continues the process of breaking down food by using enzymes released by the pancreas and bile from the liver.  Bile is a compound that aids in the digestion of fat and eliminates waste products from the blood.
  7. 7. • Large intestine : The large intestine (colon) is the last part of the digestive system. • Its function is to absorb water from the remaining indigestible food matter, and then to pass useless waste material from the body by Rectum then anus.
  8. 8. Pancreas : Among other functions, the pancreas secretes enzymes into the small intestine. These enzymes break down protein, fat, and carbohydrates from the food we eat . Liver : has many functions, but two of its main functions within the digestive system are :  make and secrete bile  cleanse and purify the blood coming from the small intestine containing the nutrients just absorbed .
  9. 9.  Gallbladder : The gallbladder is a pear-shaped reservoir that sits just under the liver and stores bile.  Bile is made in the liver then travels to the gallbladder through a channel called the cystic duct.  During a meal, the gallbladder contracts, sending bile to the small intestine.
  10. 10. What is gastro-intestinal hormones ? • The GI hormones are secreted by epithelial cells lining the lumen of the stomach and small intestine . • GI hormones are secreted into blood . • they affect function of other parts of the digestive tube , liver, pancreas, brain .
  11. 11. Hormones source function Gastrin secreted by the mucous lining of the stomach the secretion of gastric acid is stimulated Cholecystokinin in the small intestine that stimulates the secretion of pancreatic enzymes Secretin into the small intestine that stimulates the secretion of water and bicarbonate from the pancreas Motilin in the stomach and small intestine controlling smooth muscle contractions Gastric inhibitory peptide in the small intestine Inhibits gastric secretion
  12. 12. summary The digestive system is one of the most important system in the body, the organ of the GI system digest the food which is the source of energy . Food passes through several stages (Mouth pharynx- esophagus – stomach – small intestine - large intestine ) to Absorption of nutrients With the help of enzymes .
  13. 13. Questions ?
  14. 14. Resources • GUYTON AND HALL textbook of Medical physiology . • Medicine books web site.
  15. 15. Thank you Don by : Mohammed Abdullah Hazazi 2nd year medical student Supervisor : DR. Kamran Afzal Assistant Professor of Physiology
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×