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Hello everyone, in this question we will be discussing about the human circulatory system that is about the heart.
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So, this here is known as the blood vascular system that consists of a muscular chambered heart that is a closed network of blood vessels and the fluid which is circulated.
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So, heart is basically the mesodermally derived organ and it is situated in thoracic cavity in between the two lungs.
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It is protected by a double walled membranous bag.
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One is the pericardium.
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This here enclose the pericardial fluid and the heart has four chambers.
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Two relatively small upper chambers that are called the atria and two larger lower chambers that are called the ventricles.
01:10
A thin muscular wall that is called the interatrial septum that separates the right atrium and the left atrium and there is a thick walled interventricular septum that separates the left ventricle and the right ventricle.
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The atrium and the ventricle of the same side are also separated by a thick fibrous tissue that is called the atrioventricular septum.
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So, now let us see the circulation.
01:43
So, here we have the lungs, here we have the heart in which there are four chambers.
01:53
The right atrium, right ventricle, left atrium and left ventricle and here we have the body part...