Male mammary glands to not provide any reproductive function. 0. level 1. monobear. Answer (1 of 3): They didn’t “evolve” to have breasts; their breast tissue and nipples are merely leftover from when they began embryonic development as a female. Both male and female mammals have mammary glands, but only the females with the mammary glands can produce milk by secreting it through their nipples connected to the alveoli cells where the milk is produced. What research is cited in Chapter 6 to support this hypothesis? As a result, the male body inherits these even if it doesn’t need them. The difference is that all mammals (such as us, dogs, cats, monkeys, etc) have mammary glands, birds do not. About three to four weeks after conception, all human embryos have mammary ridges that run parallel on each side of the body, from the top of the chest to the lower abdomen. Why do men have nipples? Because females do." 16 Do cars have umbilical cords? So, there are a couple of reasons in general why male mammals have nipples, though not all males do. The male cat nipples appear like small protrusions. Despite these exceptions (and the all males one is, arguably a big one), there is not a major reason that the term “mammal” should not continue to be used today. Why Do Useless Organs Persist? To declare the unique hairs of one mammal to be vestigial to those of another is biological nonsense. 14 Do cats fart? Differences among the sexes (called sexual dimorphism) within a given species are considered by evolutionary biologists to be mostly the result of sexual selection, directly or indirectly.There is a consensus that the male nipple exists because there is no particular … If this is the case, why is nature so adamant about sprouting them to this day? A similar process is observed in all mammals, including humans. Question: Most male mammals have nipples although they do not produce milk. Why do men have nipples?To prove they're mammals, obviously. Like female dogs, male dogs have nipples, which extend in two rows from the chest into the groin area. Why do male cats have nipples? If you go back far enough in the evolutionary chain, our ancestors were no longer all that mammal-ish, but that was over 200 million years ago. Men have nipples because embryos are always female in their early stages, and males only differentiate from the female prototype after a few weeks. So why do male cats have nipples? "I have received more than a dozen requests to explain how evolution could possibly produce such a useless structure," evolutionary biologist Stephen Jay Gould wrote in a journal column back in 1993 . Let’s begin with a quick overview of dog nipples. So, why do men have nipples? Mammary glands are the glands that have evolved from modified sweat glands to produce milk for offspring. Why Do Male Mammals Have Nipples Discussion in 'Creationism' started by Debbie3832, Jun 19, 2019. Many male mammals, humans included, have nipples. Male mammals have nipples because females need them and the embryonic pathway to their development builds precursors in all mammalian fetuses, enlarging the breasts later in females but leaving them small (and without evident function) in … Why do male cats have nipples? Why males have nipples has been the subject of scientific research. 12 Did Adam and Eve have belly buttons? Not only that, but a desexed male will look different from an entire male cat. However, there has been not really researched on this but it for the same reason as other mammals. Almost all mammals have nipples. HERE'S WHY MEN HAVE NIPPLES. It is only after … 13 Do fish have belly buttons? That's why both males and females have nipples. The male nipples have several important functions, ... , but they also can occur almost anywhere on the body—even in locations where mammals do not have mammary glands such as on the back, arms, neck, legs, shoulder and buttocks. You usually find them as little raised spots that extend way up from their groins to their stomachs. The word “breast” has a very different meaning when used to describe the chest of a bird and that of a female mammal. The same applies to all male mammal mammals. Unlike female dogs, they do not possess a reproductive function, so they don't generally secrete — and if they do, you should consult a vet, just to make sure everything's okay. Male and female animals start out life almost identical in utero, complete with nipples. That's because the ancestral population had nipples. 24 +13 United States Baptist Private. Why do you think men have nipples? In humans, a single baby is the norm. then Why Do Men Have Nipples? 4. So, why do men have . tl;dr - Nipples evolved in a population a LONG time ago. ∙ 2011-09-13 17:36:11. Caring for children to the age of 20 while intelligence develops is humans winning recipe. ... "The presence of nipples in male mammals is a genetic architectural by-product of nipples in females. While we usually think of the mammary gland as a female organ, its early development in males in most mammals is indistinguishable from females. Very early in their maturation, male and female human embryos are essentially the same. Pigs win the numbers game with 18 mammary glands (nine pairs). Almost all mammals have nipples. But if you look at other animals that are male they do not have nipples. Since its a useful structure, populations retained them, both male and female. Male nipples do not serve the primary function of lactation that is served by female nipples. Why do male cats have nipples? Chickens DO NOT have nipples, and nipples are [almost] exclusively exclusive to mammals (with a few exceptions, one of which being the platypus which is a nipple-less mammal). Many male mammals have been found to have nipples. This sack is also lightly furred. There are two entirely different explanations why male mammals have non-functional nipples. So, why do men have nipples? Answer: NoAnswer:Actually, male cats can indeed have nipples! The answer has to do with how humans develop in the womb. All male mammals have nipples because the embryos all start out female, and some of them develop into males later. But they do that after the nipples have formed. Dogs have eight because they have more puppies at once than people have babies. downtide is correct that dogs, like humans, develop nipples. On dogs, the count varies. It is in the DNA of all mammals that nipples be developed before the gender of the fetus is determined. Scientists believe that the reason behind this is the result of natural genetic selection –- or lack thereof. During this period all embryos have nipples. . “The milk kind of oozes out onto the patch, and the young lap it up.” WATCH: Squirrels balance caution and curiosity as they seek and cache their food. They are pinkish-light in color and bear the cat’s skin color. Nipples seem somewhat superfluous on males if they are not going to nurse offspring. Many stallions (male horses), for example, do not even have vestigial nipples, which was an argument presented in Linnaeus’ time against using the breast as a means of nomenclature. But in other mammals, including people, males and females start out developing the same as fetuses. This template has many nipples on it, typically as many as ten. There are various theories, let’s take a look at the one that makes the most sense – the theory of evolution. Many male mammals, humans included, have nipples. . Males in those families also have nipples. If men and women have them, then the question we SHOULD ask is why we as a species have nipples to begin with. Males in those families also have nipples. Why do men have nipples? Monotreme (egg-laying mammals) males, such as platypuses, do not have nipples but then again neither do the females; they excrete milk through modified sweat glands. Why Do Boys Have Nipples? Male cats have nipples because of fetal development. The number of nipples you find on dogs varies with the dog breed though. Humans are mammals, which is an animal class distinguished by 3 things; giving birth to live young, sweat glands, and fur (or hair, in our case). And all mammals have mammary glands so they can produce milk and feed their young. Differences among the sexes (called sexual dimorphism) within a given species are considered by evolutionary biologists to be mostly the result of sexual selection, directly or indirectly.There is a consensus that the male nipple exists because there is no particular … 10 Do giraffes have belly buttons? They don’t have nipples at all. This answer is: Male Breast Tissue and Nipples . So, why do men have nipples? Yes, male dogs have nipples, just like the females. As the male cat gets older, the nipples are not quite obvious, simply because nature determined that they are not needed. Cats and dogs will have 8-10 mammary glands (4-5 pairs) whereas rodents will have 10-12. Debbie3832 New Member. Unlike female dogs, they do not possess a reproductive function, so they don’t generally secrete — and if they do, you should consult a vet, just to make sure everything’s okay. Is male lactating common or rare? Although male cows have nipples, they do not produce milk because they do not have udders and their mammary glands halt when their sex is defined. Both male and female cats have nipples. Also, do male pigs have mammary glands? 39–41 During puberty, the accessory nipple may enlarge somewhat. They do not function or produce milk, just like male humans have nipples but are void of any use. So, there are a couple of reasons in general why male mammals have nipples, though not all males do. Dogs have eight because they have more puppies at once than people have babies. Male humans certainly aren't part of the club. Feeding babies through the navel, and then from the breasts, instead of using a yolk like birds and reptiles, is the evolutionary trait that has made mammals so successful. Wiki User. The reason for so many nipples is because dogs tend to have so many puppies at a go. Since its a useful structure, populations retained them, both male and female. Cats can have an odd number of nipples, so if you’re trying to determine how many your male cat has, explore his belly to count his nipples and set your inquiring mind at ease. Why do men have nipples? The reason that males have nipples is that during development in the fetus, everyone first develops as a female and the human chest and nipples develop before the Y chromosome is introduced into the fetus. All these embryos have structures that will ultimately form the defining physical characteristics of male and female. Launer J(1). Science believes that it’s part of the natural selection process and basically the nipples on male mammals were overlooked. Some other male mammals do not have nipples; mice, rats, and horses being some of the prominent examples. A north American opossum can have up 13 nipples/teats because that number reflects the amount a species can have in a litter. That's because the ancestral population had nipples. Let’s begin with a quick overview of dog nipples. Get an answer for 'Do all or most male mammals have nipples? In the first four to five weeks, nipples start to develop, but it isn't until after six or seven weeks that the sex chromosomes (XX for female or XY for male) assert any differences. Do most mammals help to nurse their child?' It is possible for a male canine to develop mammary gland tumors on occasion. These nipples are formed during the embryonic stage before sex is determined, so that is why all male mammals, including your cat, have nipples. You usually find them as little raised spots that extend way up from their groins to their stomachs. ... All mammals have hair. Also, do male pigs have mammary glands? Male and female animals start out life … Answer (1 of 16): A distinguishing feature of mammals, this is a question that has provoked centuries of theories and explanations.littledan77 As a foetus in the womb, we are all of the same template until around six weeks gestation. How Many Nipples do Female Dogs Have. Most female mammals have an estrous cycle, yet only ten primate species, four bats species, ... Why do male lions mate with each other? The number of nipples you find on dogs varies with the dog breed though. Do male greyhounds have nipples? Author information: (1)London Deanery, Stewart House, London WC1B 5DN, UK. In the first four to five weeks, nipples start to develop, but it isn’t until after six or seven weeks that the sex chromosomes assert any differences. A Newfie will have a bigger nipple than a chihuahua. The reason that male dogs, as well as human males, have nipples is all about fetal development. Unfortunately the problem with these explanations wasn't just their banality. Also to know is, why do all mammals have nipples? However, because the process is under genetic control, mistakes can happen. Both male and female cats have the same number of nipples. It is still possible for a male dog's breasts to become swollen, red or have other discoloration. At this stage the male Y chromosome is triggered and determines the male characteristics by releasing testosterone which prevents the formation of … Obviously, their nipples are not able to produce milk the ones the female dog has. It usually falls within 8 and 10 nipples, but they could also range from 6 to 12. Pigs win the numbers game with 18 mammary glands (nine pairs). Another male mammal without nipples is the brown rat, or Rattus norvegicus (the typical laboratory rat). jlauner@londondeanery.ac.uk PMID: 21173054 [Indexed for MEDLINE] MeSH terms. Horses do, though, and this is partly for one reason. Compiled by Billy Goldberg, an emergency medicine physician, and Mark Leyner, bestselling author and well-known satirist, Why Do Men Have Nipples? Why Do Chickens Have Breasts but Not Nipples? Secondly, do all male species have nipples? ... "The presence of nipples in male mammals is a genetic architectural by-product of nipples in females. 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