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VesicleSecretory vesicleCytoplasmic vesicleCortical granule


Cortical granules are secretory organelles located under the cell membrane of unfertilized oocytes. Following fertilization, cortical granules fuse with the oocyte's cell membrane and release their contents into the extracellular matrix. This exocytosis, known as the cortical reaction, is involved in the prevention of polyspermy. Cortical granules are found in all mammals and many other vertebrates, as well as some invertebrates.


Cortical vesicle


› Cellular component
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