Sperm and Egg cell - are specialised for reproduction
Egg cell main fucntion to carry female DNA and to nourish the devloping Embryo in the early stages, egg cell contains huge food reserves for the embryo.
When a sperm fuses with an egg, eggs membrane instantly changes it structure to stop more sperm getting into the egg, making sure Embryo has correct amount of DNA.
Sperm to get the male DNA to the female DNA, long tale and streamlined head to swim to the egg, lot of mitocondira in cell to provide the energy needed.
Sperm also carries enzymes in their heads to digest through the egg cell membrane
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