Structure and function of heart by Shashank Bandre Class 10 CBSE

In this slide you will get information about the structure and mechanism of heart ................ :) :) Hope it will help you....... :)

1. KENDIRYA VIDYALAYA SARNI SCIENCE PROJECT WORK FUNCTION AND MECHANISM OF HEART SUBMITTED TO:- SUBMITTED BY:- MRS. GUNNY MAM SHASHANK BANDRE KHELESH BHALEKAR 10 th ‘A’

2. STRUCTURE OF HEART Septum

3. The heart is roughly triangular in shape. It is made up of a special muscle called as cardiac muscles. The size of our heart is as big as our fist. The heart has four compartments called ‘chambers’. The upper two chambers called atria, and the two lower chambers are called ventricles. The heart has four valves Tricuspid valve Mitral valve Pulmonary valve Aortic valve

4. The heart is divided into left and right side by a septum. The right side of our heart pumps blood from heart to lungs and the left side of our heart pumps blood to all parts of the body.

5. HOW HEART WORKS? Blood from our body that is low in oxygen returns to the superior and inferior vena cava, to fill hearts right atrium. W hen the right atrium is filled with blood, the tricuspid valve opens and blood is pumped into the right ventricle. This is called as arterial sisterly. When the right ventricle is filled with blood the tricuspid valve closes to prevent blood from flowing back into the right atrium. Full with blood, heart right ventricle contracts the pulmonary valve and blood is pumped into pulmonary artery and onto our lungs.

6. The pulmonary valve quickly closes to prevent blood from flowing back into the right ventricle. Oxygen rich blood return from the lungs through the pulmonary veins and fill the left atrium. Left atrium contracts, the mitral valve opens and the blood is pumped into the left ventricle. This occurs at the same time when a new contraction is taking place in hearts right atrium. When left ventricle is filled with blood, the mitral valve closes to prevent the blood from flowing back into the left atrium.

7. Left ventricle contracts and aortic valve opens and the blood is transported to all parts of the body and the aortic valve quickly closes to prevent blood from flowing back into the left ventricle. This occurs at the same time when a new contraction is taking place in the right ventricle .