Notices
Results 1 to 6 of 6

Thread: Why are mens testicles on the outside of the body?

  1. #1 Why are mens testicles on the outside of the body? 
    Forum Ph.D. Raziell's Avatar
    Join Date
    Sep 2008
    Posts
    935
    Feel its a rather stupid question. But i cant see the reason, and with reason i mean advantages, of the mans testicles being outside the body. Why couldnt they might aswell have been inside the body? It seems strange that such a "weakness" would survive evolution.


    A lie is a lie even if everyone believes it. The truth is the truth even if nobody believes it. - David Stevens
    Reply With Quote  
     

  2.  
     

  3. #2  
    Veracity Vigilante inow's Avatar
    Join Date
    Oct 2009
    Location
    Austin, TX
    Posts
    3,500
    Temperature control. Sperm need to be at a fairly specific temperature to survive. Keeping them in the body would be too warm.

    You'll notice that when you're hot, they sag lower... it increases surface area, increases cooling, and takes them farther away from the heat of the body.

    When you're cold, they pull inward to warm again. This is why there is the common joke about jumping in a cold pool and things "disappearing" for some men, or why they experience shrinkage. The cold causes them to retract in order to ensure they warm again.

    The sperm can only exist within a fairly specific temperature window. Having them outside the body allows us modulate temperature more effectively.


    EDIT: I'm not sure if it's about sperm "existence" or sperm "production," but the idea is that temperature has a huge impact on their health.


    Reply With Quote  
     

  4. #3  
    New Member Insanity's Avatar
    Join Date
    Mar 2011
    Location
    Tau Ceti
    Posts
    4
    Temperature control is important for healthy sperm production.

    As inow mentioned, there is a small range of temperature in which healthy sperm is produced. Sperm cannot survive in high temperatures, and for humans the optimal temperature is 2įC below normal body temperature. If not maintained at the correct temperature, sperm may be non-fertile, non-motile, or have other defects. While there are always sperm that are defective to a degree, the percentage that are increases at higher temperatures.
    Reply With Quote  
     

  5. #4  
    Suspended
    Join Date
    Dec 2008
    Location
    Nirgendwo und Ueberall
    Posts
    1,300
    how would I be able to fondle them otherwise?
    Reply With Quote  
     

  6. #5  
    Forum Sophomore
    Join Date
    May 2007
    Posts
    180
    Good functional answers but the question is flawed. "Why" indicates a reason, a logic. Evolution doesn't follow reason or logic - it effectively tries many different pathways and those that work sustain.
    Reply With Quote  
     

  7. #6  
    Forum Professor jrmonroe's Avatar
    Join Date
    Mar 2010
    Posts
    1,515
    I also found it interesting that the sperm/blood/nerve conduits for the testicles donít pass into the abdomen at the groin, but run (left and right) under the skin up the belly to about where the bladder is, then go through two openings in a couple layers of abdominal, sheet-like muscles.

    This is where inguinal hernias occur (ie, the opening ruptures) when men lift something too heavy, and the intestine that can subsequently bulge through the rupture can also advance down into the scrotum or even the thigh. (Yesh!)

    Women also have this inguinal opening (something called a "round ligament" passes through it), and women can also suffer inguinal hernias.
    Almost everything you do will seem insignificant, but it is important that you do it. (Mahatma Gandhi) Grief is the price we pay for love. (CM Parkes) Our postillion has been struck by lightning. (Unknown) War is always the choice of the chosen who will not have to fight. (Bono) The years tell much what the days never knew. (RW Emerson) Reality is not always probable, or likely. (JL Borges)
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •