Nipple is, generally, the name given to the mammalian nipple, or to things resembling it, such as the tip of an artificial teat or the tip of a grease secreting mechanism in machinery. ==Anatomy== In the anatomy of mammals, a nipple or mammary papilla is a small projection of skin containing the outlets for 15-20 lactiferous ducts arranged cylindrically around the tip. The physiological purpose of nipples is to deliver milk produced in the female mammary glands during lactation to the infant. In the male, nipples are often not considered functional with regard to breastfeeding, although male lactation is possible. Mammalian infants have a ''rooting'' instinct for seeking the nipple, and a ''sucking'' instinct for extracting milk. Mammals typically have an even number of nipples arranged bilaterally. Rarely, as in the platypus, the mammary glands empty onto the skin without a nipple. In human anatomy, the two nipples are located near the center of the breasts, surrounded by an area of sensitive, pigmented skin known as the areolas. The nipple and areola can be erotic receptors, or considered sex organs, of males and females. Stimulation or sexual arousal can cause the nipples to become erect. Breastfeeding or exposure to cold temperatures often have this effect as well. Small non-striated myocytes (muscle cells) arranged cylindrically within the nipple are responsible for this erection of the nipples. Embryology, nipples develop along the 'milk lines' which in humans extend from the axilla (armpit) down to the pubis (groin) on both sides. Most people develop two nipples (one on each breast) but some have supernumerary nipples. Occasionally, these have lactiferous glands attached. Sometimes, baby (male or female) are born producing milk. This, called "witches' milk", is caused by maternal estrogens acting on the baby and is quite normal. Witches' milk disappears after several days. ==Plumbing== In plumbing, a nipple is a short piece of threaded tubing used as a coupling. ==Devices== For bicycles, a nipple is a nut placed at the end of each wheel spoke. ==Instruments== An Eastern Asian instrument known as a gong#Nipple gongs is so named because of its similar shape to a nipple. ==See also== * ''List of sexology topics'' : Areola, Breast, Erection, Male lactation, Masters and Johnson, Masturbation, Nudity, Sex organ, Sexual arousal * ''Biological development'' : Breastfeeding, Infant, Oxytocin, Prolactin, Supernumerary_nipple, Tit, Wet nurse, Witch's milk * ''Modification methods'' : Nipple piercing, Body nullification, Jewellery * ''Other'' : Nipplegate, Slippery Nipple (a cocktail). Integumentary system
why have we lost this: : All mammals have an even number of nipples, through which females lactation; ? :Fixed. - User:Patrick 17:10 20 Jun 2003 (UTC) ::A few mammals don't have nipples; zero is an even number.User:KJ Sam 07:12 22 Jun 2003 (UTC) I was under the impression that having nipples was part of the definition of mammal! Which mammals don't have nipples? Also; some mammals have an odd number of nipples but as far as I'm aware this is a freak occurance and no species generally have an odd number. : A number of marsupials don't have nipples. User:Jeremykemp 00:36, 9 Feb 2005 (UTC) ::Marsupials are not mammals, they are marsupials. User:Boffy b 23:23, 2005 Mar 22 (UTC) :::"Marsupials are mammals" says the first three words of marsupial. -- User:John Fader (User talk:John Fader | Special:Contributions/John Fader) 23:29, 22 Mar 2005 (UTC) ::::Well it's all lies and a conspiracy. You'l see. User:Boffy b 23:52, 2005 Mar 22 (UTC) ::Jeremy, I can't find mention of that at marsupial or here. If you have a cite it would make an interesting factiod for both articles. -- User:John Fader (User talk:John Fader | Special:Contributions/John Fader) 00:09, 23 Mar 2005 (UTC) A sectional drawing would be more informative here than a photograph of a nipple, to show, for example, the functional relation of the nipple to surrounding tissues. Also, should there be images of other types of nipples (baby bottle, industrial, cattle, etc.)? User:Hawstom 07:05, Feb 3, 2005 (UTC) :Seems appropriate to me. Have any? User:Limeheadnyc 20:56, 8 Feb 2005 (UTC) Here's a hint. If the anons are removing the nipple profile continually [drum roll] it might not be a very good image, and the article might be better off empty until something better is found. Sometimes listening to repeated anons is the wisest course. If we are honest with ourselves, we have to admit we can do better. User:Hawstom 23:36, Feb 23, 2005 (UTC) :Marsupials are a sub type of mammals and they do have nipples inside the pouch. ::''Marsupials are the group of mammals commonly thought of as pouched mammals. They give live birth, but they do not have long gestation times like placental mammals. Instead, they give birth very early and the young animal, essentially a helpless embryo, climbs from the mother's birth canal to the nipples. There it grabs on with its mouth and continues to develop, often for weeks or months depending on the species. The short gestation time is due to having a yolk-type placenta in the mother marsupial. Placental mammals nourish the developing embryo using the mother's blood supply, allowing longer gestation times.'' [http://www.ucmp.berkeley.edu/mammal/marsupial/marsupial.html] :User:Zen-master User talk:Zen-master 23:27, 22 Mar 2005 (UTC) It seems to me that a disambiguation page would make sense here. Monotremes such as Platypus dont have nipples they secrete milk through glands into their fur, they are not mamals, marsupials are mammals and have nipples inside their pouches :''"The platypus (Ornithorhynchus anatinus) is a small, semi-aquatic mammal endemic to the eastern part of Australia"''. See Platypus. --User:Timc | User_talk:Timc 01:37, 15 Jun 2005 (UTC)
See other meanings of words starting from letter:
Words begining with Nipple:
Nipple
Nipple
Nipplegate
Nippleman
Nipples
Nipplewort
Nipple_discharge
Nipple_gong
Nipple_piercing
Nipple_ring
Nipple_wrench
Nipple
Nipple is, generally, the name given to the mammalian nipple, or to things resembling it, such as the tip of an artificial teat or the tip of a grease secreting mechanism in machinery. ==Anatomy== In the anatomy of mammals, a nipple or mammary papilla is a small projection of skin containing the outlets for 15-20 lactiferous ducts arranged cylindrically around the tip. The physiological purpose of nipples is to deliver milk produced in the female mammary glands during lactation to the infant. In the male, nipples are often not considered functional with regard to breastfeeding, although male lactation is possible. Mammalian infants have a ''rooting'' instinct for seeking the nipple, and a ''sucking'' instinct for extracting milk. Mammals typically have an even number of nipples arranged bilaterally. Rarely, as in the platypus, the mammary glands empty onto the skin without a nipple. In human anatomy, the two nipples are located near the center of the breasts, surrounded by an area of sensitive, pigmented skin known as the areolas. The nipple and areola can be erotic receptors, or considered sex organs, of males and females. Stimulation or sexual arousal can cause the nipples to become erect. Breastfeeding or exposure to cold temperatures often have this effect as well. Small non-striated myocytes (muscle cells) arranged cylindrically within the nipple are responsible for this erection of the nipples. Embryology, nipples develop along the 'milk lines' which in humans extend from the axilla (armpit) down to the pubis (groin) on both sides. Most people develop two nipples (one on each breast) but some have supernumerary nipples. Occasionally, these have lactiferous glands attached. Sometimes, baby (male or female) are born producing milk. This, called "witches' milk", is caused by maternal estrogens acting on the baby and is quite normal. Witches' milk disappears after several days. ==Plumbing== In plumbing, a nipple is a short piece of threaded tubing used as a coupling. ==Devices== For bicycles, a nipple is a nut placed at the end of each wheel spoke. ==Instruments== An Eastern Asian instrument known as a gong#Nipple gongs is so named because of its similar shape to a nipple. ==See also== * ''List of sexology topics'' : Areola, Breast, Erection, Male lactation, Masters and Johnson, Masturbation, Nudity, Sex organ, Sexual arousal * ''Biological development'' : Breastfeeding, Infant, Oxytocin, Prolactin, Supernumerary_nipple, Tit, Wet nurse, Witch's milk * ''Modification methods'' : Nipple piercing, Body nullification, Jewellery * ''Other'' : Nipplegate, Slippery Nipple (a cocktail). Integumentary system
Nipple
why have we lost this: : All mammals have an even number of nipples, through which females lactation; ? :Fixed. - User:Patrick 17:10 20 Jun 2003 (UTC) ::A few mammals don't have nipples; zero is an even number.User:KJ Sam 07:12 22 Jun 2003 (UTC) I was under the impression that having nipples was part of the definition of mammal! Which mammals don't have nipples? Also; some mammals have an odd number of nipples but as far as I'm aware this is a freak occurance and no species generally have an odd number. : A number of marsupials don't have nipples. User:Jeremykemp 00:36, 9 Feb 2005 (UTC) ::Marsupials are not mammals, they are marsupials. User:Boffy b 23:23, 2005 Mar 22 (UTC) :::"Marsupials are mammals" says the first three words of marsupial. -- User:John Fader (User talk:John Fader | Special:Contributions/John Fader) 23:29, 22 Mar 2005 (UTC) ::::Well it's all lies and a conspiracy. You'l see. User:Boffy b 23:52, 2005 Mar 22 (UTC) ::Jeremy, I can't find mention of that at marsupial or here. If you have a cite it would make an interesting factiod for both articles. -- User:John Fader (User talk:John Fader | Special:Contributions/John Fader) 00:09, 23 Mar 2005 (UTC) A sectional drawing would be more informative here than a photograph of a nipple, to show, for example, the functional relation of the nipple to surrounding tissues. Also, should there be images of other types of nipples (baby bottle, industrial, cattle, etc.)? User:Hawstom 07:05, Feb 3, 2005 (UTC) :Seems appropriate to me. Have any? User:Limeheadnyc 20:56, 8 Feb 2005 (UTC) Here's a hint. If the anons are removing the nipple profile continually [drum roll] it might not be a very good image, and the article might be better off empty until something better is found. Sometimes listening to repeated anons is the wisest course. If we are honest with ourselves, we have to admit we can do better. User:Hawstom 23:36, Feb 23, 2005 (UTC) :Marsupials are a sub type of mammals and they do have nipples inside the pouch. ::''Marsupials are the group of mammals commonly thought of as pouched mammals. They give live birth, but they do not have long gestation times like placental mammals. Instead, they give birth very early and the young animal, essentially a helpless embryo, climbs from the mother's birth canal to the nipples. There it grabs on with its mouth and continues to develop, often for weeks or months depending on the species. The short gestation time is due to having a yolk-type placenta in the mother marsupial. Placental mammals nourish the developing embryo using the mother's blood supply, allowing longer gestation times.'' [http://www.ucmp.berkeley.edu/mammal/marsupial/marsupial.html] :User:Zen-master User talk:Zen-master 23:27, 22 Mar 2005 (UTC) It seems to me that a disambiguation page would make sense here. Monotremes such as Platypus dont have nipples they secrete milk through glands into their fur, they are not mamals, marsupials are mammals and have nipples inside their pouches :''"The platypus (Ornithorhynchus anatinus) is a small, semi-aquatic mammal endemic to the eastern part of Australia"''. See Platypus. --User:Timc | User_talk:Timc 01:37, 15 Jun 2005 (UTC)
See other meanings of words starting from letter:
N
NA | NB | NC | ND | NE | NF | NG | NH | NI | NJ | NK | NL | NM | NO | NP | NR | NS | NT | NU | NW | NX | NY | NZ |Words begining with Nipple:
Nipple
Nipple
Nipplegate
Nippleman
Nipples
Nipplewort
Nipple_discharge
Nipple_gong
Nipple_piercing
Nipple_ring
Nipple_wrench
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