Answer: Left ventricle.
- A Right atrium
- B Right ventricle
- C Left atrium
- D Left ventricle
Correct answer: D. Left ventricle
Explanation: The left ventricle pumps oxygenated blood to the body via the aorta (systemic circulation). It has the thickest walls.
A single ECG cycle: the P wave marks atrial depolarisation (contraction signal), the large QRS complex marks ventricular depolarisation, and the T wave marks ventricular repolarisation (recovery) before the next cycle begins.
Concept context
Blood, lymph, the heart, the cardiac cycle, blood pressure, and ECG. High NEET weightage.