9.3 - 2016 Jan Q10
(a) The diagram shows a human heart.
(i) Name the part of the heart that pumps blood to the body. (1)
(ii) Describe how blood is oxygenated before it reaches the heart. (3)
(iii) Describe the structure of the blood vessel that returns oxygenated blood to the heart. (2)
(b) The table gives information about the heart rate and the volume of blood pumped out of the heart for an athlete and a non-athlete.
(ii) Describe how blood is oxygenated before it reaches the heart. (3)
(iii) Describe the structure of the blood vessel that returns oxygenated blood to the heart. (2)
(b) The table gives information about the heart rate and the volume of blood pumped out of the heart for an athlete and a non-athlete.
(i) Calculate the volume of blood pumped out of the heart per minute, for the non-athlete. (2)
Show your working
volume per minute = .................................................................... dm3
(ii) Suggest why the heart of the athlete can pump out more blood per heartbeat than the heart of the non-athlete. (2)
Show your working
volume per minute = .................................................................... dm3
(ii) Suggest why the heart of the athlete can pump out more blood per heartbeat than the heart of the non-athlete. (2)