(a)[2]
Enter the names of structures X and Y in the boxes on Fig. 1.1.
(b)[1]
The perichondrium contains collagen fibres, and these fibres are made from collagen molecules. Collagen is one example of a type of biological molecule. State the name of the type of biological molecule that collagen is an example of.
(c)[1]
The structures in the gas exchange system are arranged alphabetically in Table 1.1. Write YES in the box if a structure contains smooth muscle. Write NO in the box if a structure does not contain smooth muscle.