Question

What is the special feature present in a human heart which does not allow mixing of blood when oxygen-rich and carbon dioxide-rich blood reach the heart?
[2 marks]
[NCERT Exemplar Q8]
[Heart]

Answer 1

Solution:

• Human heart is four chambered consisting of two atria and two ventricles. (0.5 marks)
• The left side of the heart receives oxygen-rich blood whereas the right side of the heart receives carbon dioxide-rich blood. (0.5 marks)
• The left and right sides of the heart are completely separated from each other by a muscular septum, which prevents the mixing of oxygen-rich and carbon-dioxide-rich blood. (1 mark)