Human Digestion

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

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

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

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

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

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

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

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

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

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