Human anatomy specimens penis. Invest Urol ;
Like the penis, sperm competition has caused the human testicles to evolve in size through sexual selection.
Little, Brown and Company.
Firstly, by displacing a meghana naidu hot male's spermthe risk of the rival sperm fertilising the egg is reduced, thus minimising the risk of sperm competition.
New Eng J Med ;
In some specimens, one side of the penile shaft had more radiations of fibres than the opposite side.
Nerves within the glans did not have a serpiginous appearance.
The coronal ridge is the part of the human penis thought to have evolved to allow for semen displacement.
The contraction of the bulbocavernosus muscle BCM is the predominant force for expelling semen from the bulbous urethra [ 11 ].