(a(i))[1]
Draw a single arrow on Fig. 1.1 to indicate the route taken by blood from a vein to the right ventricle.
(a(ii))[1]
State the letter of the blood vessel carrying blood at the greatest pressure and give its name.
(b(i))[1]
Suggest what makes the valves at 1 and 2 close during one heartbeat.
(b(ii))[1]
State the function of valves 1 and 2 in the heart.
(c)[4]
Using Fig. 1.1, describe and explain the path of blood from the right ventricle to the lungs.
(d)[2]
State the name of the heart part labelled 3 and state its role in the mammalian circulation.