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Programme 15: Responding to Stimuli Answers to Activity Sheet 3
The Eye A large diagram of the eye can be used to revise the names of the important parts and key ideas about the way that the eye works. Label the diagram
Pupils work in groups of three. One pupil has the diagram; the other two take turns to describe a part of the eye. These can be drawn from a pile of cards cut out from the downloaded sheet. The pupils are not allowed to name the part but should describe it so that the first pupil can identify it. The name is added to the diagram. Annotate the diagram
Working as a team the students decide which statements are concerned with particular parts of the eye. The cards can be pasted to the diagram. Name | Description | Ciliary muscles | Muscles that change the thickness of the lens | Choroids | A black layer with lots of blood vessels | Cornea | Clear part that lets light into the eye | Vitreous humour | Transparent jelly that supports the back part of the eye | Conjunctiva | Transparent protective layer at the front of the eye moistened by tears | Retina | Contains light sensitive rod and cone cells | Aqueous humour | Watery liquid filling the front part of the eye | Fovea | The most sensitive part of the retina | Lens | Made of stiff jelly and can change shape to focus light | Iris | Controls the amount of light entering the eye | Suspensory ligaments | Fibres supporting the lens | Blind spot | Part of the retina where the optic nerve enters the eye; there are no light sensitive cells here | Pupil | Opening in the iris through which light passes | Optic nerve | Carries nerve impulses to the brain | Sclera | Tough, white protective layer |
[15/1 Insert a copy (reduced?) of large diagram of eye with parts labelled]
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