Answer:
Alimentary canal of man
it 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,
Pharynx The
oral cavity opens into the pharynx. The swallowing mechanism guides the masticated
food through the pharynx into a tube, called esophagus,
Oesophagus
It is a muscular, tubular part of the alimentary canal. The muscular movement called
peristalsis carries the food down to the stomach.
Stomach
It is a J-shaped sac-like muscular structure that serves as a storehouse of
food. It a large organ which expands when food enters it. The muscular walls
helps in mixing food thoroughly with more digestive juices.
Small
intestine 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
intestine The 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
by sphincter muscles. It allows the faucal matter to be egested out.
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