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Portal Circulation

Systemic circ...

Question

Systemic circulation of oxygenated blood starts from

A

Right atrium

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B

Left atrium

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C

Left ventricle

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D

Right ventricle

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Solution

The correct option is C Left ventricle
Systemic circulation is the flow of blood from the left ventricle of heart to all parts of body and return of blood to the right atrium of heart. The oxygenated blood leaves the left ventricle through aorta and deoxygenated blood returns to the right atrium through superior and inferior vena cava. The purpose of systemic circulation is to transport oxygen and nutrients to body tissues and remove carbon dioxide and other wastes. Hence, systemic circulation of oxygenated blood starts from left ventricle.
So, the correct answer is 'Left ventricle'.

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Q. Assertion :Pulmonary circulation consists of flow of deoxygenated blood from right ventricle to the lungs and flow of oxygenated blood from lungs to the left atrium. Reason: Systemic circulation consists of flow of oxygenated blood from the left ventricle to all parts of the body and deoxygenated blood from different parts to right atrium.

During systemic circulation, deoxygenated blood flows from right ventricle of heart to lungs.

Q. Assertion: Left ventricle pumps oxygenated blood to different body parts while the right ventricle pumps deoxygenated blood to the lungs.
Reason: Right atrium receives deoxygenated blood from different parts of the body while the left ventricle pumps oxygenated blood to different parts of the body.

Q. Systemic circulation involves pumping of oxygenated blood to the whole body and collecting the deoxygenated blood back to the heart.

Q. Read the statements and select the option which best describes the process that occurs during systematic circulation.
(i) The left atrium receives the oxygenated blood through the pulmonary veins. The left ventricle pumps the blood through the aorta to various parts and the de-oxygenated blood reaches right atrium.
(ii) The left atrium receives the oxygenated blood through pulmonary veins and pumps the blood through the aorta to various parts and the de-oxygenated blood reaches the right atrium.
(iii) The left atrium receives de-oxygenated blood and pumps into left ventricles which in turn pumps into pulmonary artery for oxygenation.
(iv) The right atrium receives the de-oxygenated blood and pumps into pulmonary artery for oxygenation.

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