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Caption: Fertilisation. Artwork of human sperm or spermatozoa (blue tails, orange heads) attempting to fertilise an ovum (green). Fertilisation is the fusing of the male (sperm) and female (ovum) sex cells to form a zygote. This will contain genetic material from both sex cells, and the new individual that may develop will inherit characteristics from both parents. The sperm will have to penetrate the thick protein coat of the ovum by releasing enzymes. The head (red) of the sperm will then release the genetic material into the ovum. Once this has happened, the ovum becomes impermeable to other sperm.

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Keywords: anatomy, artwork, biological, biology, conception, egg, female, fertilisation, fertilization, gametes, human, human body, illustration, male, oocyte, ovum, physiology, reproduction, reproductive, sex cells, spermatocyte, spermatozoa, spermatozoon

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