The diagram given below represent the human heart in one phase of its activity. Study the same and then answer the question that follows:
(a) Name the phase?(b) which part of the heart is contracting in this phase? Give a reason to support your answer.(c) Name the parts numbered 1 to 6(d) What type of blood flows through the parts marked 1 and 2 respectively?(e) How many valves are closed in this phase?