Question

Systemic circulation is

• A. Left ventricle $\underset{blood}{\stackrel{Deoxygenated}{\to }}$Tissues $\underset{blood}{\stackrel{Oxygenated}{\to }}$Right ventricle
• B. Right ventricle $\underset{blood}{\stackrel{Oxygenated}{\to }}$Tissues $\underset{blood}{\stackrel{Deoxygenated}{\to }}$Right auricle
• C. Left ventricle $\underset{blood}{\stackrel{Deoxygenated}{\to }}$Tissues $\underset{blood}{\stackrel{Oxygenated}{\to }}$Right auricle
• D. Left ventricle $\underset{blood}{\stackrel{Oxygenated}{\to }}$Tissues $\underset{blood}{\stackrel{Deoxygenated}{\to }}$Right auricle

Answer 1

The correct option is D

Left ventricle $\underset{blood}{\overset{Oxygenated}{\to }}$Tissues $\underset{blood}{\overset{Deoxygenated}{\to }}$Right auricle

Explanation of the correct option:

The correct option is D:

1. Systemic circulation is the process where the blood starts flowing from the heart to all the organs of the body except lungs, and returns back to the heart.
2. Pulmonary circulation is the process where blood passage starts from the heart to the lungs and then again to the heart is known as pulmonary circulation.
3. This gives the double circulation in the human body.
4. The heart is divided into four parts - two auricles and two ventricles.
5. The passage of blood in the body can be represented as below:

Left atrium

⇓ Oxygenated blood

Left vetricle

⇓ Oxygenated blood

Tissues

⇓ Deoxygenated blood

Right auricle

⇓ Deoxygenated blood

Right venticle

⇓ Deoxygenated blood

Lungs

⇓ Oxygenated blood

Left atrium

Explanation of the incorrect options:

Option A:

1. The left ventricle always supplies oxygenated blood to the tissues, not deoxygenated blood and the tissues always supply deoxygenated blood to the right auricle, not oxygenated blood to the right ventricle.

Option B:

1. The right ventricle always supplies deoxygenated blood to the lungs, not oxygenated blood to the tissues.

Option C:

1. The left ventricle always supplies oxygenated blood to the tissues, not deoxygenated blood and the tissues supply deoxygenated blood to the right auricle, not oxygenated blood.

Hence the correct systemic circulation is,

Left ventricle $\underset{blood}{\overset{Oxygenated}{\to }}$Tissues $\underset{blood}{\overset{Deoxygenated}{\to }}$Right auricle