FACTOID # 22: South Dakota has the highest employment ratio in America, but the lowest median earnings of full-time male employees.
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Encyclopedia > Graafian 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. Cells in culture, stained for keratin (red) and DNA (green) The cell is the structural and functional unit of all living organisms. ... Human female internal reproductive anatomy Ovaries are a part of a female organism that produces eggs. ... A human ovum An ovum (also oocyte, ovocyte, or loosely, egg or egg cell) is a female sex cell or gamete. ... Ovulation is the process of discharging a mature ovum (egg) from an ovary after a Graafian follicle - representing the final stage of follicular development before ovulation - has been formed. ... You may be looking for albumen, or egg white. ...

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, germ cells, or spores—are the specialized cells that come together during fertilization (conception) in organisms that reproduce sexually. ... Schematic diagram of a sperm cell, showing the (1) acrosome, (2) cell membrane, (3) nucleus, (4) mitochondria, and (5) flagellum (tail) A sperm cell, or spermatozoon ( spermatozoa) (in Greek: sperm = semen and zoon = alive), is the haploid cell that is the male gamete. ... For the article on the figure of speech, see meiosis (figure of speech). ... 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 (or oestrogens) are a group of steroid compounds that function as the primary female sex hormone. ...

See also

Human female internal reproductive anatomy Ovaries are a part of a female organism that produces eggs. ...

Reproductive system
Female: Cervix - Clitoris - Fallopian tubes - Bartholin's glands - Hymen - Mammary glands - Ovaries - Skene's glands - Urethra - Uterus - Vagina
Male: Bulbourethral glands - Cowper's glands - Ejaculatory duct - Epididymis - Penis - Prostate - Scrotum - Seminal vesicles - Spermatic cord - Testes - Urethra - Vas deferens

  Results from FactBites:
Luteinizing hormone information page. This sex hormone has various roles to play in the human body. (211 words)
It is produced by the pituitary gland and is a glycoprotein, operating in conjunction with follicle-stimulating hormone (FSH).
In females it promotes the transformation of the graafian follicle (a small egg-containing vesicle in the ovary) into the corpus luteum, an endocrine gland that secretes progesterone.
In males it stimulates the development of the interstitial cells of the testes that secrete testosterone, the male sex hormone.
  More results at FactBites »



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