Home SCIENCE Digestive Systems-Regularly asking details for KPSC Examinations

Digestive Systems-Regularly asking details for KPSC Examinations

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Digestive Systems and its explaination

Below given details are very important in any examinations conducted by Kerala Public Service Commissions.So study those who are preparing for KPSC Examinations

The process of converting food into energy giving substance is carried out by the digestive system. The digestive system consists of alimentary canal (buccal cavity, esophagus, stomach, small intestine, large intestine ending in the rectum and anus) and the associated glands. Alimentary canal is a long tube which is 6-9 meters long and starts from mouth and ends at anus. The parts of the alimentary canal are mouth pharynx, esophagus, stomach, small intestine, large intestine. The mouth leads into a funnel shaped pharynx, which is the common passage for food and air. Pharynx lead into esophagus which is about 25cm long. The three division of large intestine are caecum, colon and rectum. Small intestine: it is the largest and narrow tubular part of alimentary canal. It measures about 6 meters in length. Small intestine, the highly coiled portion has divisions such as duodenum, jejunum and ileum. Digestion is of two types Intra cellular digestion: The digested products pass to the cytoplasm across the endocytotic inside membrane Eg : Amoeba. Extra Cellular digestion: cell synthesis one or more enzymes for digesting specific type of nutrient. The liver is the Largent gland of body. It secretes bile, containing bile pigments and bile organic salt. If intestine contains no food, the bile flows to gall bladder, instead of duodenum which contract and secrete bile later when food is present in intestine. The large intestine secrets no enzyme and play only a minor role in the absorption of nutrients


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