A correct systemic circulation pathway is

Options

A. Right auricle `to` Left ventricle `to ` Aorta `to` Tissue `to` Veins
B. Right Ventricles `to` Pulmonary aorta `to ` Tissues `to` Pulmonary vein `to` Left auricle
C. Left atrium `to` Left ventricle `to` Aorta `to` Arteries `to` Tissues `to` Veins `to` Right atrium
D. left auricle `to` Left ventricle `to` Pulmonary aorta `to` Tissues `to` Right auricle

Answer

To determine the correct systemic circulation pathway, we need to understand the flow of blood through the heart and the body. Here’s a step-by-step breakdown of the systemic circulation pathway:

### Step-by-Step Solution:

1. **Start at the Left Atrium**: Blood that has been oxygenated in the lungs returns to the heart via the pulmonary veins and enters the left atrium.

2. **Move to the Left Ventricle**: From the left atrium, the oxygenated blood flows through the bicuspid (mitral) valve into the left ventricle.

3. **Exit through the Aorta**: The left ventricle contracts and pumps the oxygenated blood into the aorta, the largest artery in the body.

4. **Distribution through Arteries**: The aorta branches into smaller arteries that distribute the oxygenated blood to various tissues and organs throughout the body.

5. **Exchange in Tissues**: In the tissues, oxygen is delivered, and carbon dioxide is collected from the cells, resulting in deoxygenated blood.

6. **Return through Veins**: The deoxygenated blood is collected by veins, which converge into larger veins.

7. **Enter the Right Atrium**: The deoxygenated blood returns to the heart via the superior and inferior vena cava, entering the right atrium.

### Final Pathway:
The correct systemic circulation pathway is:
- Left Atrium → Left Ventricle → Aorta → Arteries → Tissues → Veins → Right Atrium.