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Hi I'm Radiant!Welcome to my science blog..I like to EAT and I love talkingandplayingand jokingandbeingcrazyand..you get the idea :D



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Wednesday, May 5, 2010


Alimentary Canal :)


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Mouth: pH7.Tongue rolls food into a bolus.Chewing and grinding of food into smaller pieces takes place here. Both chemical and mechanical digestion takes place. Starch digestion starts here, the enzyme salivary amylase is released here, and starch becomes maltose. Maltose is then broken down into glucose with the help of the enzyme maltase.

Oesophagus: Starch digestion continues. Food is pushed down and travels down to the stomach by the oesaphagus.

Stomach: pH2. Hydrocloric acid makes the conditions of the stomach acidic. Therefore it is suitable for the enzyme pepsin to act on proteins.Protein digestion begins here. With pepsin acting on them, proteins are broken down into amino acids.

Small intestine:pH9(For duodenum and jejunum).All three sources of energy are digested here.Fat digestion starts here. Enzymes trypsin, pancreatic amylase,maltase and lipase is released. Fat is turned into 1 glycerol and 3 fatty acids by lipase. Again, starch is digested by pancreatic amylase into maltose, which is then turned into glucose.Protein is broken down into amino acids.
Ileum--- Absorption of digested food substances. Villi present on the walls of the ileum, and micro-villi (multiple folds) in the villi, to increase the surface area for quick diffusion.The villi is also supplied with a network of capillaries for quick diffusion. The food then passes through the hepatic portal vein.

Large intestine: Absorption of water..


rained @ 4:44 AM