People living in Himalayan regions have red cheeks why ?
Differentiate between pulmonary artery and pulmonary vein.
Explain the working mechanism of the heart. or In detail write about mechanism of heart.
What do you mean by pulmonary blood circulation ? illustrate with figure.
What do you mean by systemic blood circulation? Illustrate with figure
Draw a diagram showing internal features of the heart.
Draw a diagram showing blood circulation in human body.
Identify the blood vessel given and label the parts A,B, C and D.
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