The human heart

Figure below shows the structure of the heart. Which structure of the heart exerts a largerforce to pump blood to all parts of the body?(SPE/2014/Q26)

• A

• B

• C

• D

Figure below shows a section through the human heart.

Which features suggests that the blood leaving the heart at Q has higher pressure than blood leaving the heart at P?(SPE/2017/Q25)

• Valve Q is stronger than valve P.

• Wall U is thicker than wall T.

• Valve P is stronger than valve Q

• Wall T is thicker than wall U.

Study the diagram of the heart in figure below. Which of the following parts is correctly labelled?(SPE/2018/Q28)

• Aorta

• Pulmonary vein

• Left atrium

• Valve

Figure below shows the structure of a human heart with the main blood vessels. Which blood vessel transports blood from the heart to the lungs?(SPE/2009/Q23)

• A

• B

• C

• D

The blood flowing in the pulmonary vein is different from the blood flowing in other veins because the blood in the pulmonary vein is _____________________.(SPE/2011/Q33)

• moving away.

• moving to the lung.

• poorer in oxygen.

• richer in oxygen.

Figure below shows blood vessels carrying blood to and away from the heart. Which of the following blood vessels carry oxygenated blood?(SPE/2012/Q38)

• 1 and 2.

• 1 and 3

• 2 and 4

• 3 and 4.

Figure below shows the structure of the human heart. What is the main function of C?(SPE/2010/Q25)

• To filter the blood.

• To make blood flow faster.

• To prevent blood from flowing backwards.

• To prevent the mixing of blood.

Figure below shows the human blood circulatory system. Why is the human circulatorysystem known as double circulatio?(SPE/2009/Q34)

• Blood travels to each organ twice.

• The heart pumps twice in each circulation.

• The blood passes the heart twice in each circulation.

• The blood travels in two different types of blood vessels.