Question

The diagram given below represents a section of the human heart. Answer the questions that follow:
(a) Which parts of heart are in the relaxation phase? Give a reason to support your answer.
(b) Label the parts numbered 1 to 4 in the diagram. What type of blood flows through them.
(c) Name all the four types of valves found in our heart.
(d) Name the blood vessels that supply oxygenated blood to the heart muscles.​

Answer 1

Answer:

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Answer 2

Answer:

(i) Here, in the image, Atria has started to contract. This contraction phase of Atria is called Atrial systole.

(ii) 1. Pulmonary Artery, 2. Superior vena cava, 3. Aorta

(iii) Upper chambers i.e., both the atria are contracting in this phase because blood is pumped towards the ventricles.

solution