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SAI International School
                                            Subject- Biology, Class-VII
                                      Topic- Transportation and Excretion
                                       Subtopic- Functioning of the Heart
                                                       Module- 20
                                                     Lesson notes

                                             FUNCTIONING OF THE HEART

















































                       The right side of the heart contains deoxygenated blood, which is received from

                        all parts of the body.
                       The deoxygenated blood is pumped to the lungs. In lungs, the blood gets rid of
                        carbon dioxide and takes in oxygen from the air inhaled into them.
                       This oxygen-rich blood is received by the left side of the heart from lungs and is
                        pumped to all parts of the body.
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