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  2. Mammalian reproduction - Wikipedia

    en.wikipedia.org/wiki/Mammalian_reproduction

    The mammalian male reproductive system contains two main divisions, the penis and the testicles, the latter of which are where sperm are produced and usually held in a scrotum. [5] In humans, both of these organs are outside the abdominal cavity , but they can be primarily housed within the abdomen in other animals.

  3. Mating - Wikipedia

    en.wikipedia.org/wiki/Mating

    In advanced groups of insects, the male uses its aedeagus, a structure formed from the terminal segments of the abdomen, to deposit sperm directly (though sometimes in a capsule called a "spermatophore") into the female's reproductive tract. Other animals reproduce sexually with external fertilization, including many basal vertebrates.

  4. Human penis - Wikipedia

    en.wikipedia.org/wiki/Human_penis

    This means that in the event of a rival male's sperm occupying the reproductive tract of a female, the human penis is able to displace the rival sperm, replacing it with his own. [42] Semen displacement has two main benefits for a male. Firstly, by displacing a rival male's sperm, the risk of the rival sperm fertilising the egg is reduced. [43]

  5. Hypospermia - Wikipedia

    en.wikipedia.org/wiki/Hypospermia

    Insufficient or low levels of testosterone in the body can affect the proper functioning of the male reproductive structures and thus lead to decreased secretions or hypospermia. Long-term exposure to drugs with anti-androgen properties (e.g. spironolactone) can also lead to infertility or low volume of semen. [2]

  6. What Happens to Your Body When You Drink Alcohol Regularly

    www.aol.com/lifestyle/happens-body-drink-alcohol...

    The initial buzz and immediate effects of alcohol may be familiar. Here’s how the long-term consequences of excessive drinking can gradually take a toll on your health. 1.

  7. Sex organ - Wikipedia

    en.wikipedia.org/wiki/Sex_organ

    In animals (including humans), the male sex organs include the testicles, epididymides, and penis; the female sex organs include the clitoris, ovaries, oviducts, and vagina. The testicle in the male and the ovary in the female are called the primary sex organs. [1] All other sex-related organs are known as secondary sex organs.

  8. Human reproduction - Wikipedia

    en.wikipedia.org/wiki/Human_reproduction

    The male reproductive system contains two main divisions: the testicles where sperm are produced, and the penis where semen is ejaculated through the urethra. In humans, both of these organs are outside the abdominal cavity. Having the testicles outside the abdomen facilitates temperature regulation of the sperm, which require specific ...

  9. ‘Alcohol gene’ could predict how cocktails may affect you ...

    www.aol.com/news/alcohol-gene-could-predict...

    "A simple mouth swab is all we need to find out whether you have inherited DNA changes that affect your ability to metabolize alcohol and may increase your risk of serious health complications ...