Question

11. the following figure illustrates?

11. the following figure illustrates- . Question 12 a

Answer 1

The answer of the question no 11 is-

The following figure illustrates the flow of blood through the heart and the lung of a human body.

The provided figure illustrates the blood flow through the heart and the lung. In the figure, the two pink coloured structures are the two lungs of our body and the structure in between the two lungs is our heart. The direction of blood flow is indicated by the arrows in the figure. At first the deoxygenated blood (i.e. the blood that has low oxygen content and high carbon dioxide content) enters into the right atrium (the right upper chamber) of our heart (deoxygenated blood is indicated by blue colour in the figure) from the upper and lower parts of our body. Two veins carry this deoxygenated blood from various parts of our body. Among them, the superior vena cava ( the pipe like structure in the right side of the figure from the upper part of the body to the right atrium of the heart) brings deoxygenated blood from the upper part of the body to right atrium of our heart. Similarly, the inferior vena cava ( the pipe like structure in the right side of the figure from the lower part of the body to the right atrium of the heart) brings deoxygenated blood from the lower part of the body to right atrium of our heart. Now, the atriums( the right atrium and the left atrium) of the heart contract and the deoxygenated blood moves from the right atrium to the right ventricle (the blue coloured right lower chamber of heart in the figure) of our heart. When the ventricles( the left ventricle and the right ventricle) contract, then from the right ventricle the deoxygenated blood with the help of pulmonary artery (the blue coloured pipe like structure from the right ventricle of the heart to the lungs in the figure). goes to the two lungs of our body. In the lung, exchange of gases (oxygen and carbon dioxide) occur. The deoxygenated blood in the lung leaves its carbon dioxide and takes up oxygen from the lung. Now, the blood becomes rich in oxygen content and it is called oxygenated blood (oxygenated blood is indicated by the red colour in the figure). Now, the oxygenated blood from the lung comes back to the left atrium (the red coloured left upper chamber of heart in the figure) of the heart with the help of pulmonary vein ( two red coloured pipe like structures from the lungs to the left atrium of the heart in the figure).Now, the atriums contract and the oxygenated blood from the left atrium moves to the left ventricle(the left lower chamber) of the heart . Now when the ventricles contract, the oxygenated blood from the left ventricle moves to the different parts of the body with the help of aorta ( the pipe like structure from the left ventricle of the heart to the upper and lower parts of the body).