Answer: tissue fluid.
- A tissue fluid
- B oxygen gas
- C only hormones
- D waste urine
Correct answer: A. tissue fluid
Explanation: Lymph (excess tissue fluid) is drained and returned to the bloodstream.
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.