Heart- CBSE

Which chamber of the heart has the thickest muscle wall?

• Pulmonary artery
• Left ventricle
• Aortic valve
• Right atrium

The diagram shows a section through the heart. Which part pumps blood to the aorta?

• A

• B

• C

• D

The diagram shows a vertical section through a human heart. What are X and Y?

• Left atrium and right ventricle

• Right atrium and left ventricle

• Right atrium and right ventricle

• Left Atrium and Left Ventricle

Why is the circulatory system of mammals described as a double circulation?

• It consists of two different types of blood cells.
• It is made up of two different types of blood vessels.
• It is a result of two separate hearts in the body.
• It consists of two separate circuits for blood flow.

In which list do all three blood vessels carry oxygenated blood?

• aorta, pulmonary artery, renal artery

• aorta, pulmonary vein, renal artery

• vena cava, pulmonary artery, renal vein

• vena cava, pulmonary vein, renal vein

The diagram shows the human heart. Which two chambers contract at the same time?

• W and X

• Z and Y

• W and Z

• X and Y