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Question : Describe the alimentary cancel of man. |
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Answer» Solution :Alimentary cancel of manIt measures about 8 to 10 metres in length and extends from mouth to anus. It has following parts Mouth It consists of the oral cavity, through which food is ingested . It contains TEETH , tongue and three pairs of salivary glands. PharynxThe oral cavity opens into the pharynx . The swallowing guides the masticated food through the pharynx into a tube , called oesophagus. OesophagusIt is a MUSCULAR , tubular part of the alimentary canal . The muscular movement called peristalsis carries the food down to the STOMACH. StomachIt is a J-shaped sac - like muscular structure that serves as a storehouse offood . It is a large organ which exoands when food enters it. The muscular walls helps in mixing food thoroughly with more digestive juices. Small intestone It is about 6 metres in length and has three divisions , i.e., duodenum (first part as C - shaped, begins from the pyloric stomach), jejunum and ileum. Large intestineThe ileum passes into large intestine , which can be divided into two parts as anterior colon and posterior rectum. The terminal part of rectum is called anal canal . It opens through the anus, guarded byaphincter MUSCLES. It allows the feacal matter to be egested out. 
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