Root hair cell in Plants: It is adapted to do its job of taking in water and nutrients by having:

- a large surface area

- a thin cell membrane

The Sperm cell is an example of a specialised animal cell:

Red Blood Cell - Carries oxygen around the body

Adaptations: No nucleus, large surface area, so maximum area for oxygen carriers: haemoglobin

White Blood Cell – Fight disease, some make antibodies

Adaptations - Irregular shape, they can change shape to squeeze out of blood vessels and get to the site of infection. Others have cytoplasm which can flow making it possible for the cell to change shape, surround and engulf bacteria. Can increase in numbers to fight disease.