Question

Put the following events in their correct order starting with the first one listed:

atria fill with blood, semi-lunar valves close, tricuspid and bicuspid valves close, ventricles contract, semi-lunar valves open, atria contract, ventricles relax, tricuspid and bicuspid valves open

Answer 1

Answer:

) Atria fill with blood, (2) ventricles relax, (3) semi-lunar valves close, (4) atria contract,

(5) tricuspid and bicuspid valves open, (6) ventricles contract, (7) bicuspid and tricuspid valves

close, (8) semi-lunar valves open.

Note: The order of semi-lunar valves and bicuspid and tricuspid valves may be reversed as their

action is virtually simultaneous.

Answer 2

Answer:

Put the following events in their correct order starting with the first one listed:

atria fill with blood, semi-lunar valves close, tricuspid and bicuspid valves close, ventricles contract, semi-lunar valves open, atria contract, ventricles relax, tricuspid and bicuspid valves open

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