Differentiate between systole and diastole.

Distinguish Between

Systole: The contraction of the heart is called systole.

Diastole: The relaxation of the heart is called diastole.

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Chapter 14 Transportation in Plants and Circulation in Animals
Evaluation | Q VIII. 4. | Page 215

The rhythmic expansion and contraction of the heart is called ______.

What is meant by ‘heart beat’?

The wave of expansion of an artery when blood is forced into it is called ______.

Initiation and stimulation of heartbeat take place by nerves.

The closure of the mitral and tricuspid valves at the start of the ventricular systole produces the first sound ‘LUBB’.

What are heart sounds? How are they produced?

Doctors use the stethoscope to hear the sound of the heart. Why?

Explain the process of breathing in man.

Observe figure and answer the given questions:

What is pulse?