(a(i))[1]
State the letter in Fig. 1.1 for the blood vessel containing blood with the greatest oxygen concentration.
(a(ii))[1]
State the letter in Fig. 1.1 for the hepatic portal vein.
(a(iii))[1]
State all of the letters in Fig. 1.1 that stand for arteries.
(a(iv))[2]
Explain the importance of the part marked Y in Fig. 1.1.
(a(v))[2]
State the evidence in Fig. 1.1 that shows the diagram is a double circulation system.
(b(i))[1]
Blood vessels X in Fig. 1.2 carry blood to skin-surface capillaries and help keep the internal temperature constant. State the name of the blood vessels represented by the letter X in Fig. 1.2.
(b(ii))[2]
Explain the reasons for the pressure changes shown in the arteries in Fig. 1.2.
(b(iii))[4]
Using the information in Fig. 1.2, explain how arteries and veins are structurally adapted.