The diagram given alongside represents the human heart in one phase of its activity. Study the same and then answer the question that follow:

(b) Which part of the heart is contracting in this phase? Give a reason to support your answer.

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Solution

•Ventricular muscles are contracting during this phase because the valves between the two ventricles and pulmonary artery and aorta are open while the atrio-ventricular valves are closed. •Ventricles contract in order to pump blood to the pulmonary artery (right ventricle pumps blood) or aorta (left ventricle pumps blood).

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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?

Q. The diagram given alongside represents the human heart in one phase of its activity. Study the same and then answer the questions that follow :
(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?