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The Digestive System

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Yu Hong Goh

on 11 August 2013

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Transcript of The Digestive System

Mouth
Rectum
The mouth is the start of the digestive system
Sources:
http://www.daviddarling.info/encyclopedia/M/mouth.html
http://www.nlm.nih.gov/medlineplus/images/mouthandteeth.png
http://inserbia.info/news/wp-content/uploads/2013/07/white-teeth-smile.jpg
-serves, basically, as a storage for poop.
-hooks up with the sigmoid colon above and with the anal canal at the bottom.
Stomach
The muscles contract and relax, breaking up the food into smaller pieces and helps in the mixing with the gastric juice for better digestion.
Functions:
- Makes food easier for us to swallow by biting
- Chewing, grinding and the mixing of the food
Important parts of the mouth:
- Tongue
- 32 Teeth
- Tonsils
- Saliva
Sources:
Science textbook Lower Secondary Volume B Pg 161
http://www.health24.com/Medical/Heartburn/Normal-digestion/GORD-the-function-of-the-stomach-20120721
http://wiki.answers.com/Q/What_is_the_function_of_the_stomach
http://images.wisegeek.com/human-stomach-crossection.jpg
http://preview.turbosquid.com/Preview/Content_2010_12_03__11_01_01/stomach%20preview%201.jpg2e60ae94-e5a8-4ece-99f4-e245506786dbLarger.jpg
http://img.webmd.com/dtmcms/live/webmd/consumer_assets/site_images/media/medical/hw/h9991275_001.jpg
The main function of the stomach is to process, digest and break down food.

It is a muscular bag that lies in the upper part of the abdomen.
Where?
What does it do?
The Oesophagus
Is commonly know as the gullet.
Enters the......
What?
consists of a muscular tube through which food passes from the pharynx to the stomach.
Sources
http://en.wikipedia.org/wiki/Esophagus
Science Textbook Lower Secondary Volume B Pg 160
No Digestion occurs in the esophagus
But Digestion of starch may occur
Digestion Starting Now....
End of Digestion
Watch What Happens....
Watch What Happens...
Enters the....
Widen your understanding
Small Intestine
The first part of the small intestine located behind the transverse colon.
Enters The....
It is used to store food and extract the necessary nutrients.
It is the end of the Large Intestine
about eight inches long
How Long?
What does it do?
Used to store food
Breaks the food down into a liquidy mixture called chyme
THE DIGESTIVE SYSTEM
LARGE INTESTINE
STOMACH
SMALL INTESTINE
ANUS
MOUTH
OESOPHAGUS
RECTUM
ACCESSORY ORGANS
Liver
production of biochemicals necessary for digestion.
Anus
the external opening of the rectum
Enters The.....
Enters The.....
Enters The.....
Large Intestine
Where the undigested food end up at.
Sources:
The Body Atlas Pg 46 and 47
http://en.wikipedia.org/wiki/Intestinal_villus
the inner lining....
not smooth like hose pipe, but folded and rigded, with a velvety texture
Within the fold
thousands of tiny, finger-shaped structures called villi
Villi (Singular: villus)
are small, finger-like projections that protrude from the epithelial lining of the intestinal wall
increases the surface area so there are more places for food to be absorbed.
Digests most of the food.
Soures:
http://en.wikipedia.org/wiki/Liver
http://medicalcenter.osu.edu/patientcare/healthcare_services/liver_biliary_pancreatic_disease/liver_anatomy_function/Pages/index.aspx
But wait we are not done yet...
ACCESSORY ORGANS
Functions
to absorb water from the remaining indigestible food matter
to pass useless waste material from the body.
Sources:
http://en.wikipedia.org/wiki/Large_intestine
The Length
is about 4.9 feet (1.5 m) long
Function
to dispose of waste products out of the body
Sources
http://wiki.answers.com/Q/What_is_the_function_of_the_anus
Sources
http://en.wikipedia.org/wiki/Pancreas
http://medicalcenter.osu.edu/patientcare/healthcare_services/liver_biliary_pancreatic_disease/pancreas_anatomy_function/Pages/index.aspx
Pancreas
is a glandular organ in the digestive system and endocrine system of vertebrates.
Gall Bladder
Gallbladder gross anatomy and local ducts connecting to the liver, pancreas and duodenum of the small intestine.
Sources
http://en.wikipedia.org/wiki/Gallbladder
http://www.gallbladderattack.com/gallbladder.shtml
http://wiki.answers.com/Q/What_is_the_function_of_the_gall_bladder
It actually isnt a vital organ in the body and our body can cope without it.
It is a 3 to 4 inch organ
The gallbladder is a small pear shaped sack that acts as a storage tank for bile
Stores about 50ml of bile from the liver
The pancreas is an elongated, tapered organ located across the back of the abdomen, behind the stomach.
There are 2 glands
This is What Happens in the Large Intestine,Rectum and Anus:)
Exocrine
Endocrine
The exocrine gland secretes digestive enzymes. These enzymes are secreted into a network of ducts that join the main pancreatic duct, which runs the length of the pancreas.
More About it
The endocrine gland, which consists of the islets of Langerhans, secretes hormones into the bloodstream
Helps break down
Carbohydrates
Fats
Proteins
Acids
Hormones secreted
Insulin
Glucagon
Somatostatin
Now We Are Really Done:)
Thanks For Looking;)
DID YOU KNOW?
The liver can lose 3/4 of its cells before it stops funcioning
More Info:)
The liver is the only organ than can regenerate
More Info
Excretes bile
Helps carry away waste
Breaks down fats
Produces cholesterol and special proteins to help carry fat through the body
Know More About Your Liver
Clears the blood of drugs and other poisonus substances
Regulates blood clotting
Resists infections by producing immune factors and removing bacteria from the bloodstream
Our second largest organ
It weighs around 1.4 to 1.6 kg
Full transcript