DIGESTIVE SYSTEM WHAT DO YOU KNOW ABOUT IT? How long is it? What is the purpose of the D.S.? How...
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Transcript of DIGESTIVE SYSTEM WHAT DO YOU KNOW ABOUT IT? How long is it? What is the purpose of the D.S.? How...
DIGESTIVE SYSTEMDIGESTIVE SYSTEM
WHAT DO YOU KNOW ABOUT IT?
How long is it?
What is the purpose of the D.S.?
How long does it take to digest your food?
MouthMouth Is Mechanical digestion
Teeth – Cuts or Grinds the food
Helps you to swallow
Saliva - water, breaks down the food through
ENZYMES – break down starches into glucose
tonguetongue1. Balls food to the back of the mouth2. Helps you swallow3. taste
pharynpharynxx
Opening to the throat
EsophagusEsophagus12 inches longMuscles push food down..Like a Snake
EPIGLOTTIS flap that blocks food and water from going into the lungs.
StomachStomachIs Chemical Digestion
Lined in MUCUS (Protects From ACID)
Growling is Empty – Stomach Muscles are Contracting
GASTRIC JUICES – 1.HYDROCHLORIC ACID: Protects you from bacteria2. ENZYMES:Break down proteins and carbs into something …called
BREAKS THE FOOD INTO CHYME CHYME GOES TO THE SMALL INTESTINE
MAIN FUNCTION OF THE STOMACH… BREAK THE FOOD
DOWN…LIKE A FOOD PROCESSOR
SMALL SMALL INTESTINEINTESTINE
18 – 23 FEET LONG1 inch in diameter
Function: 1 Chemical Digestion 2 Absorption of Nutrients are completed
Villi = Tiny fingers contains tiny blood vessels(capillaries) absorb nutrients into the blood stream
Large Large intestineintestine5 feet long
2.5 inches in diameter
Fiber and other materials that are not broken down go here and absorbed
Water absorbed into intestinal wall
Chyme …becomes FECES
RectuRectumm
anusanusFinal phase of the digestive system.
Feces comes out of the rectum
KidneysKidneysThe filter system of the body.Kidneys filter waste out of the blood and most liquid is re-absorbed into the blood stream.
1% is not useful and goes to the bladder as urine.
LIVERLIVERIt acts as a warehouse where the blood takes all the nutrients.
Weights 3 ½ pounds
Produces BILE = breaks down fat(remember fat does not dissolve in blood or water)
BILE BILE Made in the LiverMade in the Liver
1. Sent to the Gallbladder
2. To the small Intestine and breaks down fat.
3. Then takes FAT to the walls of the Sm. Int. and absorbed into the blood stream
Pancreas
Makes insulin – and helps regulate sugar levels
Makes Enzymes that react to the chyme
GallbladderStores Bile and sends it to the small intestine
(acts as a warehouse)
Tips to take care Tips to take care of D.S.of D.S.
1. Chew slowly2. Brush and Floss3. Exercise
4. Nutritious food…fiber foods