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>> YOUR LINK HERE: ___ http://youtube.com/watch?v=pOyvEoAZyNo
A musical explanation of the digestive system. • Access Mr. W's interactive biology curriculum, https://learn-biology.com. You won’t believe how much biology you — or your students — will learn. • HIGH SCHOOL TEACHERS: Have your school purchase a license so all of your students can access our interactive tutorials. Learn more and sign up for a free trial at:https://Learn-biology.com/ap-bio-teac... • COLLEGE PROFESSORS: Help your students master the most complex topics in biology, with interactive tutorials about DNA replication, photosynthesis, immunity, cellular respiration, and so much more. Learn more and sign for a free trial at: https://Learn-biology.com/professor-w... • STUDENTS: We’ve got interactive tutorials, flashcards, AP Bio practice FRQs, videos, and more songs. Sign up at https://learn-biology.com/l-b_student.... For $29.95 you get a full year's access. • BUY THE BIOMANIA BIOLOGY APP: https://learn-biology.com/app/ • Lyrics: • They say you are what you eat, which leaves me with a question • 'Bout this food on my plate and its impending digestion. • How this protein, fat and carbohydrate that you see • Is gonna get broken down and rebuilt into me? • Ingestion’s the start, it’s when you take the food in • Breaking down the food, that's digestion • And then the food gets absorbed or assimilated • What you can’t absorb, it’s gotta be eliminated • Chewing and grinding food to forms so little • That kind of digestion is mechanical • And enzymes breaking polymers to monomers so simple • That kind of digestion is chemical • In ‘most animals, earthworms, gnats or rats, • There’s a tube that’s called the digestive tract. • Attached to the tract are parts that secrete, • Enzymes and juices to break down what you eat • CHORUS • Breaking food down in your digestive tract • Polymers to monomers enzyme attack • Food becomes chyme, disassembly line • You are what you eat so watch how you dine! • Liver and pancreas keep on secreting • Juices for treating the food you’ve been eating • Mouth to esophagus, stomach, intestine, • Colon to rectum to anus digestion! • The teeth grind food increasing surface area, • Of any food you’d find, in any cafeteria • The salivary glands release salivary amylase • Which chemically digests starch, a carbohydrate • Then swallowing moves mood to the esophagus • Choking is prevented by the epiglottis • Which covers the up the windpipe so you won’t choke or cough • The epiglottis seals the trachea off! • Peristalsis moves food through the digestive tract, • In waves smooth muscles contract and relax • So it’s not gravity that moves the food from place to place, • You can eat upside down, or in outer space. • The stomach’s the next place your food will go, • Hydrochloric acid makes the pH low • The low pH makes proteins relax • Setting them up for enzyme attack • Pepsinogen’s an enzyme that the stomach secretes, • Acid makes it into pepsin which breaks apart proteins • A soupy mixture known as acid chyme forms in your tummy • It’s what you vomit when you’re sick it’s anything but yummy • The stomach sends the chyme on the next step on this trip, • Pyloric sphincter opens, allowing chyme to drip • Into the duodenum, the start of the intestine, • Leading us into another moment in digestion • Now it's time for bile, that bitter green secretion • Whose job is to emulsify the fat that you've been eatin' • The gall bladder stores bile that the liver synthesizes • Fat gobs are split into digestible sizes • The duodenum gets the bile from the bile duct, • And more secretions come in through the pancreatic duct • Bicarbonate is one, it’s job is to neutralize • The acid from the stomach so intestines will be alkaline. • This pancreatic juice, it's an enzymatic brew • With amylase and protease and lipase in that stew • As food moves along, enzymes break down each polymer • ‘Til nothing's left of food but the simplest monomers • We're ready for absorption: no cause for confusion • Food moves from intestines to the bloodstream by diffusion • The intestine's villi, increase surface for absorption • Food diffuses into the blood, no matter what the portion! • After this absorption, the system ain’t restin’ • What’s left moves to the colon, the large intestine • Feces forms from indigestible food and fiber • It’s the same in earthworms, or antelopes or tigers. • Reabsorbing water, it’s a main colonic function, • It flows from the colon to the blood without compunction. • And you can thank the bacteria in your colon, • For synthesizing vitamin K and Biotin • But other colonic things ain’t so cute • The gases, farts, that make us toot • Nitrogen, hydrogen, CO2 and methane, • The last one’s a cause of climate change. • The appendix is a little pouch that sometimes can excite us, • When it’s inflamed it causes pain it’s called appendicitis • It’s functionless, vestigial so you can take mine out of me • Its surgical removal is called an appendectomy • The rectum’s the last stop on this pathway within us, • The feces is stored ‘til it exits out the anus, • What started as food, now meets its final fate • As it exits out our body as we eliminate.
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