Red Blood Cell
Contains haemoglobin
Haemoglobin with carries oxygen/ transports oxygen to the cells and around the body.

Has a biconcave shape for maximum surface area to allow more oxygen to be absorbed efficiently.

Biconcave shape also allows the shape to become flexible when being transported through the thinnest capillaries.

Cells have a thin outer membrane to allow oxygen to be diffused easier.

No nucleus so there is more room for oxygen to be carried in the cell.

Sperm Cells

To fertilise the ovum

Have long tails to allow the sperm to swim to the ovum to fertilise.

Head contains genetic information and a nucleus and an enzyme to help penetrate egg cell membrane to allow fertilisation.

Middle section directly after head contains mitochondria to provide the cell with energy.

Nerve Cell

Transports electrical impulses from brain via the spinal chord to another part of the body.
( From a receptor to a effector)

Have a long axon (nerve fibre) to carry the impulse to the target organ.

End plate forms a synapse with an effector.

Dendrites extend from cell body to make connections with other neurones.

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GCSE Biology Notiz am Life processes , erstellt von elliemay.doll am 31/03/2016.