Question

The diagram below depicts the human heart in one of its phases. Answer the questions that follow:

1. Which part of the heart is in the contraction phase?
2. Give a suitable reason to justify your answer in (a).
3. Distinguish between Systole and Diastole.

Answer 1

1. Ventricle parts of the heart.
2. These are the lower two chambers of the heart.
3. Distinguish between Systole and diastole:

S. No.	Systole	Diastole
1.	Occurs when the heart contracts to pump blood out.	occurs when the heart relaxes after a contraction.
2.	The normal range of systolic blood pressure should be 90 - 120mmHg.	The normal range of diastolic blood pressure should be 60 - 80 mm Hg.