Answer: right atrium.
- A right atrium
- B left atrium
- C right ventricle
- D left ventricle
Correct answer: A. right atrium
Explanation: The vena cava empties deoxygenated blood into the right atrium.
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.