NEET Biology question
A red blood cell, entering the right side of the heart passes through the following structures 1. Atrioventricular valves 2. Semilunar valves 3. Right atrium 4. Right ventricle 5. SAN Which of the following options represents the correct sequence?
Answer: (D)
Solution
The impulse originates at the SA node (5) in the right atrial wall, triggering atrial contraction so blood moves through the right atrium (3), across the open
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