DIGESTIVE SYSTEM The organs that break down food so that it can

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Transcript DIGESTIVE SYSTEM The organs that break down food so that it can

The human body has systems
that break down nutrients and
remove waste.
DIGESTIVE SYSTEM
The organs that break down food so
that it can be used by the body.
1) Digestion, 2) Absorption,
3) Elimination
DIGESTION
DIGESTIVE TRACT BEGINS IN THE
MOUTH – TEETH, TONGUE, SALIVA,
ESOPHAGUS, STOMACH
MECHANICAL – BREAKING, CRUSHING,
& MASHING OF FOOD
CHEMICAL – ENZYMES BREAK DOWN
LARGE MOLECULES INTO NUTRIENTS
THAT THE BODY CAN USE
ABSORPTION
MOST CHEMICAL DIGESTION TAKES PLACE
AFTER FOOD LEAVES THE STOMACH – IN
THE SMALL INTESTINE WITH FLUIDS FROM
THE PANCREAS, LIVER, AND
GALLBLADDER (Pg. 638)
SMALL INTESTINE HAS MANY FINGERLIKE
PROJECTIONS CALLED VILLI – COVERED
WITH NUTRIENT ABSORBING CELLS THAT
PASS NUTRIENTS TO THE BLOODSTREAM
ELIMINATION
THE END OF THE LINE – MATERIAL
THAT CAN’T BE ABSORBED INTO THE
BLOOD IS PUSHED INTO THE LARGE
INTESTINE
ABSORBS WATER, STORES,
COMPACTS, AND THEN ELIMINATES
INDIGESTIBLE MATERIAL FROM THE
BODY THROUGH THE RECTUM AND
ANUS