Coloured LM of a fertilised human egg 24 hours old

Coloured LM of a fertilised human egg 24 hours old

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Caption: Fertilised egg. Coloured light micrograph of a human egg cell 24 hours after fertilisation. The egg cell is coloured pink. Inside it are two rounded pronuclei (orange), one comes from the egg and the larger one from the sperm. When they fuse, the egg becomes a zygote containing the full 46 human chromosomes. Around the egg is a thick zona pellucida layer (yellow); sperm can be seen (black dots) embedded in this layer. Remnant corona cumulus cells (green) are also seen which originally enclosed the egg in the ovary. This egg will soon begin its first cell division. Magnification: x170 at 6x7cm size. x220 at 4x5".

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Keywords: 24 hours, anatomy, corona cumulus cells, egg, fertilisation, fertilised, fertilization, human, human body, in fertilisation, light micrograph, ovum, pronuclei, reproduction, sperm, zona pellucida

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