PARTS OF DIGESTIVE SYSTEM• Mouth• Pharynx• Esophagus• Stomach• Small Intestine• Large Intestine• Accessory Organs
MOUTHTeeth mechanically Epiglottis is a flap-like break down food into structure at the back of small pieces. Tongue the throat that closes mixes food with saliva over the trachea (contains amylase, preventing food from which helps break entering it. down starch).
PHARYNX The human pharynx (plural: pharynges) is the part of the throat situated immediately inferior to (below) the mouth and nasal cavity, and superior to the esophagus and larynx. The human pharynx is conventionally divided into three sections: the nasopharynx (epipharynx), the oropharynx (mesopharynx), and the laryngopharynx (hypopharynx). The pharynx is part of the digestive system and also the respiratory system; it is also important in vocalization.03/06/13 4
ESOPHAGUSApproximately 10” longFunctions include:1.Secrete mucus2.Moves food from the throat to the stomach using muscle movement called peristalsisIf acid from the stomach gets in here that’s heartburn.
STOMACHJ-shaped muscular bag that stores the food you eat, breaks it down into tiny pieces.Mixes food with digestive juices that contain enzymes to break down proteins and lipids.Acid in the stomach kills bacteria.Food found in the stomach is called chyme.
SMALL INTESTINESmall intestines are roughly 7 meters longLining of intestine walls has finger-like projections called villi, to increase surface area.The villi are covered in microvilli which further increases surface area for absorption.
SMALL INTESTINENutrients from the food pass into the bloodstream through the small intestine walls.Absorbs: 80% ingested water Vitamins Minerals Carbohydrates Proteins Lipids • Secretes digestive enzymes 8
LARGE INTESTINEAbout 5 feet longAccepts what small intestines don’t absorbRectum (short term storage which holds feces before it is expelled).
LARGE INTESTINEFunctions Bacterial digestion Ferment carbohydrates Protein breakdown – Absorbs more water – Concentrate wastes
ACCESSORY ORGANS Not part of the path of food, but play a critical role. Include: Liver, gall bladder, and pancreas
LIVERDirectly affects digestion by producing bile Bile helps digest fat • filters out toxins and waste including drugs and alcohol 12
GALL BLADDERStores bile from the liver, releases it into the small intestine.Fatty diets can cause gallstones
PANCREASProduces digestive enzymes to digest fats, carbohydrates and proteinsRegulates blood sugar by producing insulin
FUN FACTS• HOW LONG ARE YOUR INTESTINES? At least 25 feetin an adult. Be glad youre not a full-grown horse -- theircoiled-up intestines are 89 feet long!• Food drying up and hanging out in the large intestinecan last 18 hours to 2 days!• In your lifetime, your digestive system may handleabout 50 tons!!
ON A SHEET OF PAPER, WRITE THE NAME OF EACH COLORED ORGAN:Green:Red:Pink:Brown:Purple:Green:Yellow:
HOW’D YOU DO?Green: EsophagusRed: StomachPink: Small IntestineBrown: Large IntestinePurple: LiverGreen: Gall BladderYellow: Pancreas Great Job!
REFERENCES AND LINKSYour Digestive System and How It Works Digestive system diagram comes from this siteThe Real Deal on the Digestive SystemPancreas: Introduction and IndexYour Gross and Cool Body - Digestive System
THE DIGESTIVE SYSTEM03/06/13 20
SMALL INTESTINE03/06/13 25
LARGE INTESTINE03/06/13 26
GALL BLADDER03/06/13 28
ASSIGNMENTWhat are the processes involve in the digestion of food?What are the two kind of digestion?03/06/13 30
SUBMITTED BY: JHOMER DENN R. SOGUILON BEED III-B03/06/13 31