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: Î³Î±Î¼ÎÏÎµÏ) âalso known as sex cells, or sporesâare 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. ...
Category: Reproductive system A sex organ, or primary sexual characteristic, narrowly defined, is any of those parts of the body (which are not always bodily organs according to the strict definition) which are involved in sexual reproduction and constitute the reproductive system in an complex organism; namely: Male: penis (notably the glans penis... Female internal reproductive anatomy Close up view of the ectocervix and external os Schematic frontal view of female anatomy The cervix (from Latin neck) is actually the lower, narrow portion of the uterus where it joins with the top end of the vagina. ... A womans clitoris extends from the visible portion to a point below the pubic bone. ... In female human anatomy, the clitoral hood, or prepuce, is a fold of skin that surrounds and protects the clitoris. ... Female internal reproductive anatomy The Fallopian tubes or oviducts are two very fine tubes leading from the ovaries of female mammals into the uterus. ... The Bartholins glands (also called Bartholin glands or greater vestibular glands) are two glands located slightly below and to the left and right of the opening of the vagina in women. ... Female internal reproductive anatomy. ... The hymen (also known under the slang names cherry and maidenhead) is a membrane which completely or partially occludes the vaginal opening in human females. ... A labium (plural is labia) is any of four folds of tissue of the female external genitalia. ... In both males and females, the breasts are composed of adipose tissue and mammary glands. ... Human female internal reproductive anatomy Ovaries are a part of a female organism that produces eggs. ... In human anatomy, the Skenes glands (also known as the lesser vestibular or paraurethral glands) are glands located on the upper wall of the vagina, around the lower end of the urethra. ... Male anatomy Female anatomy In anatomy, the urethra is a tube which connects the urinary bladder to the outside of the body. ... Female internal reproductive anatomy The uterus or womb is the major female reproductive organ of most mammals, including humans. ... Human female internal reproductive anatomy. ... Appearance of the vulva Labeled picture of external female reproductive anatomy. ... Male Anatomy In the anatomy of the male human body, the bulbourethral glands (or Cowpers glands) are two small, rounded, and somewhat lobulated bodies, of a yellow color, about the size of peas, placed behind and lateral to the membranous portion of the urethra, between the two layers of... Male Anatomy In the anatomy of the male human body, the bulbourethral glands (or Cowpers glands) are two small, rounded, and somewhat lobulated bodies, of a yellow color, about the size of peas, placed behind and lateral to the membranous portion of the urethra, between the two layers of... Male Anatomy The Ejaculatory ducts are part of the human male anatomy, which cause the reflex action of ejaculation. ... Male Anatomy The epididymis is part of the human male reproductive system and is present in all male mammals. ... Male Anatomy This article needs to be cleaned up to conform to a higher standard of quality. ... A frenulum (or frenum) is a small fold of tissue that prevents an organ in the body from moving too far. ... Glans penis. ... The penis (plural penises) or phallus (plural phalli) is the external male copulatory organ of some animals, and, in mammals, the external male organ of urination. ... Male Anatomy The prostate is a gland that is part of male mammalian sex organs. ... The scrotum (human variant shown) is a thin extension of the abdomen that contains the testes and helps regulate their temperature. ... Male Anatomy The seminal vesicles are a pair of glands on the posterior surface of the urinary bladder of males. ... Male Anatomy The spermatic cord is the name given to the cord-like structure formed by the vas deferens and surrounding tissue (veins, arteries, nerves, and lymphatic vessels) that run from the abdomen down to each testicle. ... Look up testicle on Wiktionary, the free dictionary. ... Male anatomy Female anatomy In anatomy, the urethra is a tube which connects the urinary bladder to the outside of the body. ... Male Anatomy The vas deferens, also called ductus deferens, (Latin: carrying-away vessel) is part of the human male anatomy. ...
Share your thoughts, questions and commentary here
Want to know more? Search encyclopedia, statistics and forums:
Press Releases |
The Wikipedia article included on this page is licensed under the
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m