HUMAN PHYSIOLOGY- DIGESTION AND ABSORPTION

HUMAN ALIMENATARY CANAL

Alimentary is a long hollow tube in humans which runs from mouth to anus. Different layers line the alimentary canal.It involves mechanical and chemical breakdown of food.

DIGESTIVE GLANDS

Food is an important source for human- beings to derive nutritional energy. Digestive glands of the alimentary canal secrete different enzymes and aids in the process of digestion.

PERISTALSIS

Peristalsis is an involuntary movements of the circular and longitudinal muscles to push the food into the stomach. This is done by peristaltic waves which are generated to pass the food.

DIGESTION, ABSORPTION AND ASSIMILATION OF PROTEIN

Protein is a large biomolecule that is digested by HCl, pepsin, trypsin and chymotrypsin. Later protein is absorbed by small intestine and remaining parts are excrete out in the form of faeces.

CALORIFIC VALUE OF CARBOHYDRATE, PROTEIN AND FAT

The energy value of a food indicates how much energy the human body can gain through metabolism. The energy value specified in KJ/100gm.

GASTROINTESTINAL HORMONE

Gastrointestinal hormones are chemical messenger that regulate the physiological functions. Gastrointestinal hormone includes gastrin, secretin, motilin, GIP, ghrelin, VIP, BBS.

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