Download The Digestive System - 4JL 2015-2016

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Transcript
The digestive system is a group of organs
working together to convert food into energy
and basic nutrients to feed the entire body.
Food passes through a long tube inside the
body known as the alimentary canal or the
gastrointestinal tract (GI tract).
The human digestive system consists of the
gastrointestinal tract plus the accessory organs
of digestion (the tongue, salivary glands,
pancreas, liver, and gallbladder). In this
system, the process of digestion has many
stages, the first of which starts in the mouth
(oral cavity). Digestion involves the breakdown
of food into smaller and smaller components
which can be absorbed and assimilated into the
body. The secretion of saliva helps to produce
a bolus which can be swallowed to pass down
the oesophagus and into the stomach
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Stomach
Osephegus
Small intestine
Large intestine
Rectum
Anus