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Ovarian follicle, light micrograph C016 / 0519
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Ovarian follicle, light micrograph C016 / 0519
Ovarian follicle. Light micrograph of a section through a secondary ovarian follicle showing signs of maturation into the antral follicle class, as indicated by small fluid-filled cavities among the layers of follicle cells. At centre is the large oocyte (egg cell) surrounded by a distinct coat of proteins called the zona pellucida, important for the penetration of the oocyte by a sperm during fertilisation. External to the follicle cells is the thecal cell layer, which produces androgen-type steroids that in turn are converted to oestrogens by the follicle cells. Oestrogen production by follicles is necessary for continuation of follicle maturation, preparation of the lining of the uterus and coordination of hormonal stimulation during the menstrual
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9238381
© MICROSCAPE/SCIENCE PHOTO LIBRARY
Cell Biology Cytological Cytology Histological Histology Layer Maturation Oocyte Ovarian Follicle Reproduction Reproductive Structure Stain Stained Structures System Tissue Zona Pellucida Cells Light Micrograph Light Microscope Section Sectioned
EDITORS COMMENTS
This print captures the intricate details of an ovarian follicle, providing a glimpse into the fascinating world of human reproduction. The light micrograph showcases a section through a secondary ovarian follicle that is in the process of maturing into an antral follicle. The image reveals small fluid-filled cavities scattered among layers of follicle cells, indicating signs of maturation. At the center lies the large oocyte, or egg cell, enveloped by a distinct protein coat known as the zona pellucida. This protective layer plays a crucial role during fertilization by facilitating sperm penetration. Surrounding the follicle cells is another important layer called thecal cells, responsible for producing androgen-type steroids that are subsequently converted to estrogen by the follicle cells themselves. Estrogen production is vital for continued maturation of the follicles, preparation of uterine lining, and coordination of hormonal stimulation during menstruation. Through this stunning visual representation, we gain insight into not only cellular structures but also their functions within our reproductive system. This photograph exemplifies how microscopic examination can unravel complex biological processes occurring within our bodies.
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