Caption: Fertilisation. Animated coloured scanning electron micrograph (SEM) of sperm (blue) attempting to penetrate a human egg (brown). Each sperm (spermatozoa) has a rounded head and a long tail with which it swims. Women usually release one egg (ovum) per month, whereas men release millions of sperm in each ejaculation. Only one of these sperm can penetrate the egg's thick outer layer (zona pellucida) and fertilise it. Fertilisation occurs when the sperm's genetic material (deoxyribonucleic acid, DNA) fuses with the egg's DNA. When this occurs the egg forms a barrier to other sperm.

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Keywords: animated, biological, biology, cell, cells, circle circles, coloured, digital rostrum, egg, false-colour, false-coloured, female, fertilisation, fertilising, fertilization, fertilizing, gamete, gametes, head, images, ken burns, magnified image, male, microscopic photos, ovum, penetrate, penetrating, penetration, reproduction, round shape, rounded circular, scanning electron micrograph, scanning electron microscope, sem, sex cell, sexual reproduction, sperm, spermatozoa, spermatozoon, subjects, tail, zona pellucida

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Fertilisation, SEM

K007/3966 Rights Managed

Downloadable master

Duration: 00:00:15

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 569.9M


Capture format: Digital Rostrum

Frame size: 4000x4000

Codec: JPEG

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