Human Digestion Human Digestion The Digestive Organs The

Human Digestion

Human Digestion The Digestive Organs The Eyes + The Nose Mechanical Digestion p The Mouth p The Stomach Chemical Digestion p The Mouth p The Stomach p The Small Intestine Rectum

The Eyes + The Nose Start the saliva (spit) p Warm up the Stomach Glands p Sense of Smell Plays a Huge Role in the Ability to Taste p

The Mouth p Contains: n Saliva that is Slightly Acidic n Amylase = an enzyme that brakes starch molecules into simple sugars (can’t break up protein or fat)

The Human Food Processor Stomachp Peristalsis = rhythmic contraction of stomach muscles to break down food p Start Protein and Fat Digestion by HCl (Hydrochloric Acid, 1 -2 p. H) and Pepsin p Blends food into a thick soupy mass called CHYME p

The Small Intestine Finishes the Digestion of Proteins into Amino Acids p Bile from the liver lets fats mix with water to finish fat digestion p Absorbs (in order of digestion) Sugars, Amino Acids, Fats, Vitamins and Minerals through Microvilli p

The Large Intestine Top of the Large Intestine is known as the colon p The Colon absorbs water p Squeezes Waste into a compact bundle p

The Rectum Here is your Last chance to absorb water before packing up the NO GOOD foods and shipping them OUT p Moves waste out of the body p

The Liver Cleans up Dead Blood Cells p Stores Sugars and Vitamins p Makes Bile p n n p Bile emulsifies fats (breaks into smaller pieces) Bile neutralizes acids Gall Bladder stores the bile made by the liver

The Pancreas Regulates sugar levels p Sends Glucagon and Insulin to the Small Intestine p Glucagon – raise blood glucose levels p Insulin – Lowers blood glucose levels p

True or False Bile breaks down large starch molecules into small starch molecules False: breaks down fats Bile is made in the liver True: then stored in gall bladder Amylase breaks. True: poly-> down starch monosaccharide into maltose Lipases are enzymes that act specifically on proteins Fats are broken down into fatty acids False: breaks down fats and glycerol True: Lipids are made of fatty acids connected by a glycerol