(a)[4]
State the names of the structures labelled J, K, L and M. Record your answers on Fig. 5.1.
(b)[2]
State which diagram, N, P, Q or R, shows the most efficient gas exchange surface. Give one reason for your choice.
(c(i))[2]
State the word equation for aerobic respiration that occurs in cells.\n\n[BLANK] + [BLANK] → [BLANK] + [BLANK]
(c(ii))[3]
Outline three ways this energy is used in the human body.