Ovarian follicle, TEM
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Ovarian follicle, TEM
Ovarian follicle. Transmission electron micrograph (TEM) of a section through an ovary, showing a primary follicle. Primary follicles contain a central oocyte (female germ cell, egg) surrounded by a single layer of cuboidal granulosa cells. These follicles have developed from earlier and less mature primordial follicles, and have entered the process of folliculogenesis whereby they enlarge and mature into more advanced follicle types. Completion of folliculogenesis results in ovulation of the oocyte. Granulosa cells also termed follicle cells, respond to follicle stimulating hormone (FSH) by secreting oestrogen hormones necessary for follicle growth and maintenance of estrogen-dependant organs in the body. Magnification: x2, 000 when printed at 10 centimetres wide
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9240787
© MICROSCAPE/SCIENCE PHOTO LIBRARY
Black And White Cell Biology Cytological Cytology Egg Cell Folliculogenesis Germ Cell Histological Histology Maturation Oocyte Organelle Organelles Ovarian Follicle Ovary Primary Follicle Reproduction Reproductive System Stage Transmission Electron Micrograph Transmission Electron Microscope Cells Section Sectioned
EDITORS COMMENTS
This print showcases the intricate details of an ovarian follicle, captured using a transmission electron microscope (TEM). The image reveals a section through an ovary, highlighting a primary follicle in its early stages. At the center of this follicle lies the oocyte, also known as the female germ cell or egg. Surrounding it is a single layer of cuboidal granulosa cells. The primary follicles depicted here have evolved from less mature primordial follicles and are now undergoing the process of folliculogenesis. This complex process involves their enlargement and maturation into more advanced types of follicles. Once this journey reaches completion, ovulation occurs, releasing the oocyte for potential fertilization. Notably, these granulosa cells play a crucial role in responding to follicle stimulating hormone (FSH) by secreting estrogen hormones necessary for both growth and maintenance of estrogen-dependent organs within the body. With its monochrome aesthetic and high magnification level when printed at 10 centimeters wide, this print offers viewers a glimpse into the fascinating world of cellular biology. It serves as a reminder that reproduction is not only an essential aspect of life but also one filled with intricate structures and processes occurring on microscopic scales.
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