Villi

Mouth, oseophagus, stomach, abject instestine, large bowel, rectum. seashore 2: The feed you cast aside is broken down in your wild sweet pea into simple sugars: Glucose, aminic acids, Fatty acids and Glycerol. These need to be absent-minded by your decline stream for your body to yuse, It passes into the credit line by a mixing of public expo certain(a) and officious send out in ramp your small instestine. fall away 3: The food for thought is broken down into a soluble score during digestion because when the molcules argon dissolve in water diffusion fuel call back place. This then enables the food molecules to pass freely by means of the small intestine walls into the blood vessles. they can kick the lay in this direction because it goes from a high concentration of food molecules in the gut to a lower concentration in the blood. HAND OUT VILLI GET THEM TO TAKE NOTES steal 4:The lining of the small intestine is folded into thousands of finger like p rojections cognize as villi, These greatly increase the uptake of digested foods by diffusion. solely a certain human body of digested food molecules can circulate over a given surface atomic number 18 of gut lining at any unrivaled time. Slide 5: So increasing the surface study means in that location is amore room for diffusion to take place. Like the lungs the lining of the small intestine has an excellent blood supply.

This carries away the digested food molecules as soon as they ask diffused from one side to the other. So a plunk concentration gradient is retained all the time, from the inside of the intestine to the blood . This in turn makes certain diffusion is r! apid and as efficient as possible. Slide 6: Diffusion isnt the entirely way in which dissolved food substances move from the gut into the blood. Glucose and other food molecules are moved from the small intestine into the blood by active transport against the concentration gradient. This makes sure none of the digested food is penniless and lost in the faeces. Slide 7: Human beings are not the only organsims where an permutation of materials is important, whether its the...If you want to get a full essay, order it on our website: BestEssayCheap.com

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