Nipples

41 to 49 of 49 messages
17/05/2013 at 15:49
fat buddha wrote (see)

all foetuses are by "default" females as the Y (male) chromosome is what ultimately defines a male.  at around the 8th week of development an inherited Y  chromosome starts to influence the developement with the production of the male hormone testosterone which then influences cellular development of male characteristics.

HTH

 

 

The Buddha is wise and benevolent and I agree with all you say.

To address the original statement by Mr Sensitive I would reiterate that a child's sex will be determined, as you say, by the presence or absence of the Y chromosome and, therefore, the testes rather than the ovaries are the important sites for sex determination.  In summary, we start in the testes as much as in the ovaries.

Edited: 17/05/2013 at 15:53
17/05/2013 at 16:14
Fergosi wrote (see)
fat buddha wrote (see)

all foetuses are by "default" females as the Y (male) chromosome is what ultimately defines a male.  at around the 8th week of development an inherited Y  chromosome starts to influence the developement with the production of the male hormone testosterone which then influences cellular development of male characteristics.

HTH

 

 

The Buddha is wise and benevolent and I agree with all you say.

To address the original statement by Mr Sensitive I would reiterate that a child's sex will be determined, as you say, by the presence or absence of the Y chromosome and, therefore, the testes rather than the ovaries are the important sites for sex determination.  In summary, we start in the testes as much as in the ovaries.

nah - I'm a biochemist innit....  

17/05/2013 at 16:22

So can you answer why men have nipples?

Edited: 17/05/2013 at 16:24
17/05/2013 at 16:47

Dull answer off elsewhere on internet below - if its a choice between men and women having nipples or men and women not having nipples then I'd go for both having nipples - breasts would be so much less interesting without a nipple to aim for

 

Essentially, men have nipples because nipples are part of the basic human design option at conception.  While modern societies may view nipples as secondary sexual organs, in reality a fetus of either sex develops nipples within a few weeks of conception.  The human fetus actually develops several sets of nipples, much like other mammals, but only one set will fully mature in the womb.  At this point in a fetus' development, there is no genetic difference between male or female.  All fetuses develop nipples, chest muscles and milk glands. 

The situation does not change until the chromosomes which determine sexual characteristics have the opportunity to affect development.  This is the classic dividing line between females with the XX chromosome and males with the XY chromosome.  While the nipples themselves may appear on both male and female fetuses, it is the introduction of hormones such as estrogen and testosterone which determine whether or not those nipples and breast tissues will function or not.

There are very few scientific conclusions concerning the original purpose or function of male nipples.  Some human body parts, such as the wisdom teeth or appendix, did serve a real purpose for early human civilizations but have since become redundant or vestigial.  There is little evidence, however, that men ever fed their young from their own lactating breasts.

17/05/2013 at 16:58

Thanks SFF. I appreciate your answer. It's a bit like my short non internet answer that apparently has no basis in fact. Yours would look better in the lancet. Any malovelence, my friend SFF is not aimed at you. 

17/05/2013 at 17:02

SR - you are spooking me out!

I agree - apparently even three paragraphs of best medical science can be summed up by 'Noone knows why men have nipples - but we have nipples so that women can have nipples'

18/05/2013 at 08:06

Men have nipples so we have solid foundation on which to start the joke, my body has at least two good points...

01/06/2013 at 03:41

I've no idea why men have nipples.... but having just completed an unprotected long run, I really wish I didn't!

 

01/06/2013 at 20:48

I hadn't thought about nipple damage until I saw this thread and I mentioned it to my wife who suggested I used her nipple guards...large flower shaped slightly see through sticky pads which I duely wore 'cos this thread had scared me.  They worked a treat, no bleeding nipples for me.

I'm not off for a soak in the bath and perhaps some tequila to deaden the pain when I remove them...


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