Fertilisation By Zoe Rees. CORONA RADIATA ZONA PELLUCIDA PERIVETELLINE SPACE CELL MEMBRANE NUCLEUS...
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Transcript of Fertilisation By Zoe Rees. CORONA RADIATA ZONA PELLUCIDA PERIVETELLINE SPACE CELL MEMBRANE NUCLEUS...
![Page 1: Fertilisation By Zoe Rees. CORONA RADIATA ZONA PELLUCIDA PERIVETELLINE SPACE CELL MEMBRANE NUCLEUS HEAD MID-PIECE FLAGELLUM PROTECTIVE COATING NUCLEUS.](https://reader035.fdocuments.net/reader035/viewer/2022062313/56649ce65503460f949b3af9/html5/thumbnails/1.jpg)
Fertilisation
By Zoe Rees
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CORONA RADIATA
ZONA PELLUCIDA
PERIVETELLINE SPACE
CELL MEMBRANE
NUCLEUS
HEAD
MID-PIECE FLAGELLUM
PROTECTIVE COATING
NUCLEUS
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CapacitationThe protective coating of PROTEINS and GLYCOPROTEINS is removed. This involves ENZYMES found in the uterus.
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The sperm is travelling towards the egg, surrounded by the CORONA RADIATA, a membrane.
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The sperm contracts the CORONA RADIATA which ruptures releasing PROTEASE ENZYMES
The enzymes DIGEST the ZONA PELLUCIDA surrounding the oocyte.
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The sperm travels through the CORONA RADIATA and ZONA PELLUCIDA and into the PERIVETELLINE SPACE.
INVERSION of the ACROSOME results in the formation of a NEEDLE-LIKE FILAMENT.
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The needle filament PIERCES the softened oocyte membrane, known as a ACROSOME REACTION. Allowing the head to penetrate.
The entry of the head stimulates THICKENING of the ZONA PELLUCIDA which prevents the entry of other sperm known as POLYSPERMY.
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The entry of the head stimulates the completion of the SECOND MEIOTIC DIVISION of the OOCYTE NUCLEUS.
The nuclei of the oocyte and the sperm FUSE together to form a DIPLOID CELL (ZYGOTE)
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