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Encyclopedia > Ovarian follicle

Ovarian follicles or Graafian follicles (after Regnier de Graaf) are the roughly spherical cell aggregations in the ovary containing an ovum and from which the egg is released during ovulation. It consists of an external fibro-vascular coat, an internal coat of nucleated cells, and a transparent, albuminous fluid in which the ovum is suspended. The maturation of the follicle is called folliculogenesis. Regnier de Graaf Regnier de Graaf (b. ... Cells in culture, stained for keratin (red) and DNA (green) The cell is the structural and functional unit of all living organisms, and are sometimes called the building blocks of life. ... Human female internal reproductive anatomy Ovaries are a part of a female organism that produces eggs. ... A human ovum An ovum (loosely, egg or egg cell) is a female sex cell or gamete. ... Ovulation is the process in the menstrual cycle by which a mature ovarian follicle ruptures and discharges an ovum (also known as an oocyte, female gamete, or casually, an egg) that participates in reproduction. ... You may be looking Albumin is a blood plasma protein that is produced in the liver and forms a large proportion of all plasma protein. ... In biology, folliculogenesis refers to the maturation of the ovarian follicle, a densely-packed shell of somatic cells that contains an immature oocyte. ...


Formation of egg cells in follicles

Gametes, sperm and egg cells, are produced by the cellular division process of meiosis. Oogenesis is the process of meiosis for egg cell formation. It begins in the ovaries and is regulated by follicle stimulating hormone (FSH). This hormone initiates the growth of ovarian follicles. FSH also stimulates the secretion of estrogen from the follicle cells, promoting the maturation of the ovum. For each primary oocyte that undergoes meiosis, only one functional egg cell is produced. The other three cells produced are called polar bodies. Polar bodies have no function and eventually deteriorate. A mature ovarian follicle actually contains the secondary oocyte. Gametes (in Greek: γαμέτες) —also known as sex cells, or spores—are the specialized germ cells that come together during fertilization (conception) in organisms that reproduce sexually. ... The signifier sperm can refer to: (mass noun, from Greek sperma = seed) a substance which consists of spermatozoa and which is a component of semen (mass noun) semen itself (informally, count noun with plural sperm or sperms) a single spermatozoon (= sperm cell) sperma ceti (Latin ceti, genitive of cetus = whale... In biology, meiosis is the process that transforms one diploid cell into four haploid cells in eukaryotes in order to redistribute the diploids cells genome. ... Oogenesis refers to the process of formation, development, and maturation of a healthy oocyte (egg) in the ovary. ... Follicle stimulating hormone (FSH) is a hormone produced by gonadotropes in the anterior pituitary gland. ... Estrogens (also oestrogens) are a group of steroid compounds that function as the primary female sex hormone. ...



Reproductive system
Female: Cervix - Clitoris - Clitoral hood - Fallopian tubes - Bartholin's glands - G-spot - Hymen - Labium - Mammary glands - Ovaries - Skene's glands - Urethra - Uterus - Vagina - Vulva
Male: Bulbourethral glands - Cowper's glands - Ejaculatory duct - Epididymis - Foreskin - Frenulum - Glans penis - Penis - Prostate - Scrotum - Seminal vesicles - Spermatic cord - Testes - Urethra - Vas deferens

  Results from FactBites:
 
Ovarian Cancer - oncologychannel (1196 words)
Ovarian cancer is a disease produced by the rapid growth and division of cells within one or both ovaries reproductive glands in which the ova, or eggs, and the female sex hormones are made.
Ovarian cancer most frequently appears in women who are older than 60 (about 50% of patients are over age 65), although it may occur in younger women who have a family history of the disease.
The ovarian arteries, which are offshoots of the abdominal aorta, furnish the ovaries and fallopian tubes with blood.
The Ovarian Follicle 2 (357 words)
Schroll down the page to follow the follicles during their maturation from primary follicles to secondary follicles and, finally, to the corpus luteum.
The blue arrow follows the the ovarian follicles from their maturation (from primary follicles) to their eventual demise (as the corpus luteum).
The corpus luteum is the enlarged remnant of the secondary (Graafian) follicle following ovulation (the release of the oocyte).
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