Name: Human Respiratory System
Uploaded: 2019-07-19
Duration: 4 min 39 s
Description: Fishes need gills for respiration, while frogs have skin as one of their respiratory organs. Check out this video for details about the respiratory organs in humans.

Question

Draw a neat labelled diagram of the longitudinal section of the human heart and show the direction of the flow of blood through the different chambers with arrow marks, and give a brief description of the blood circulation through it.

Accepted Answer

The heart is pear shaped structure, triangle in outline, wider at the anterior end and narrower at the posterior end. The size of the heart is approximately the size of ones own fist. The heart is covered by two layers of membranes. The membranes are called pericardial membranes. The space between these layers is filled with pericardial fluid, which protects the heart from shocks.

The heart is divided into four chambers. The two upper chambers are called the left and right atrium. The two lower chambers are called the left ventricle and right ventricle.

The right auricle receives blood from the different parts of the body.

The left auricle receives oxygen-rich blood from the lungs.

The right ventricle pumps out blood containing waste materials to the lungs.

The left ventricle pumps the blood out of the heart to the different parts of the body.

Draw a neat labelled diagram of the longitudinal section of the human heart and show the direction of the flow of blood through the different chambers with arrow marks, and give a brief description of the blood circulation through it.

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