(a)[4]
Identify and describe the functions carried out by the cells labelled A and B in Fig. 3.1.
(b)[2]
Describe the way platelets in the blood prevent disease.
(c(i))[2]
From the list, circle two excretory products in humans. amino acids, cellulose, carbon dioxide, glucose, lipase, oxygen, urea
(c(ii))[2]
State the names of any two hormones made by the reproductive organs.