Which one of the following animals has two separate circulatory pathways?
1. Frog
2. Lizard
3. Whale
4. Shark
List I | List II | ||
A. | Tricuspid valves | I. | Guards the opening between right atrium and right ventricle |
B. | Sino-atrial node | II. | Guards the opening between the left atrium and the left ventricle |
C. | Mitral valves | III. | Guards the opening of right and left ventricles into pulmonary artery and aorta, respectively |
D. | Semilunar valves | IV. | Cardiac musculature in the right upper corner of right atrium |
List I | List II | ||
A. | P wave | I. | Heart muscles are electrically silent |
B. | QRS complex | II. | Depolarisation of ventricles. |
C. | T wave | III. | Depolarisation of atria. |
D. | T-P gap | IV. | Repolarisation of ventricles. |