What is the correct sequence of blood flow through the heart and lungs? Left atrium -> left ventricle -> lungs ->right atrium -> right ventricle Right atrium -> right ventricle -> lungs ->>left atrium -> left ventricle Right ventricle -> right atrium -> lungs ->left ventricle -> e left atrium Left ventricle -> left atrium -> lungs ->right ventricle -> right atrium e e e C

To solve this problem, we need to understand the basic anatomy and physiology of the heart and lungs, focusing on the path that blood takes through these organs.1. **Starting Point**: Blood returns to the heart from the body. We need to identify where this blood, which is deoxygenated, enters the heart.2. **Through the Heart**: Once the blood is in the heart, it follows a specific path through the chambers of the heart and out to the lungs.3. **To the Lungs**: In the lungs, the blood picks up oxygen (becomes oxygenated).4. **Back to the Heart**: Oxygen-rich blood returns to the heart.5. **Out to the Body**: Finally, this oxygenated blood is pumped out to the body.Now, let's examine each option:- **Option A**: Left atrium left ventricle lungs right atrium right ventricle - This sequence is incorrect because it starts with the left atrium, where oxygenated blood from the lungs should be entering, not leaving. - **Option B**: Right atrium right ventricle lungs left atrium left ventricle - This sequence is correct. Blood enters the heart through the right atrium, moves to the right ventricle, goes to the lungs to get oxygenated, returns to the heart via the left atrium, and is finally pumped out to the body through the left ventricle. - **Option C**: Right ventricle right atrium lungs left ventricle left atrium - This sequence is incorrect because it suggests blood flows from the right ventricle to the right atrium, which is the reverse of the actual direction. - **Option D**: Left ventricle left atrium lungs right ventricle right atrium - This sequence is incorrect because it starts with the left ventricle and suggests blood flows backwards to the left atrium.**Conclusion**: The correct sequence of blood flow through the heart and lungs is from the **right atrium right ventricle lungs left atrium left ventricle**. This path ensures that deoxygenated blood from the body is sent to the lungs to pick up oxygen and then pumped back out to the body fully oxygenated. **Accurate Answer**: Right atrium right ventricle lungs left atrium left ventricle