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SAI International School
                                            Subject- Biology, Class-VII
                                            Topic- Nutrition in Animals
                                      Subtopic- Human Digestive System-I
                                                        Module-7
                                                     Lesson Notes



                                             Human Digestive System


































               Digestion in Human
                     The digestive system of human beings is well-developed and is a complex organ
                       system.
                     It  consists  of  mouth,  oesophagus,  stomach,  small  intestine,  large  intestine,
                       rectum and anus.
                     It is also called as – Alimentary canal or Digestive tract or gastrointestinal tract.
                     It is about 8-10 metre long in adults.
                     Different glands also play an important role in the process of digestion.
                     Glands, such as, Salivary gland, Pancreas, and Liver.

               Role of various organs in digestion of human beings
                   1.  Mouth


                       Digestion of food starts in the mouth (Also known as buccal cavity).The food is
                       ingested through the mouth.
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