Figure 3 shows a diagram of the human eye. Answer the following questions based on the diagram. (a)(i) Identify P, Q, R. (ii) State two properties of S. (b) Which two structures enable accommodation?

Here are the answers to the questions based on Figure 3:

a)

• (i) Identify the parts labelled P, Q and R in Figure 3. P: $\boxed{\text{Optic nerve}}$ Q: $\boxed{\text{Iris}}$ R: $\boxed{\text{Cornea}}$

• (ii) State two properties of structure S in Figure 3.

  1. $\boxed{\text{Transparent}}$
  2. $\boxed{\text{Elastic / Flexible}}$ (or Biconvex, Refracts light)

b) Which two structures in Figure 3 enable the eye to carry out accommodation of the eye?

1. $\boxed{\text{Ciliary body / Ciliary muscles}}$
2. $\boxed{\text{Suspensory ligaments}}$

c) Apart from the eye, name two other sense organs of the human body.

1. $\boxed{\text{Ear}}$
2. $\boxed{\text{Skin}}$ (or Nose, Tongue)