Ejaculation should feel pleasant, but some medical conditions and treatments can make it painful. With painful ejaculation, you typically feel discomfort in the penis, but you may also notice it in the testes, rectum, or the lower abdomen. The pain can be mild or unbearable and may be gone...
Human Anatomy Picture of the Vagina 2009 WebMD, LLC. All rights reserved. The vagina is an elastic, muscular canal with a soft, flexible lining that provides lubrication and sensation. The vagina connects the uterus to the outside world. The vulva and labia form the entrance, and the cervix...
Image Collection: Human Anatomy Picture of the Vagina 2009 WebMD, LLC. All rights reserved. The vagina is an elastic, muscular canal with a soft, flexible lining that provides lubrication and sensation. The vagina connects the uterus to the outside world. The vulva and labia form the entrance...
Anatomy of a Penis The penis is a male sexual organ. The shaft is the longest part of it. The head or glans is at the end of the shaft. The opening at the tip of the head, where urine and semen come out, is called the meatus. ...
which is a spectacularly dumb piece of engineering and therefore great evidence against intelligent design creationism. It wasn’t the first time I’d heard of the RLN, of course. It’s one of the touchstones of both human anatomy and evolutionary biology; anatomy because of its clinical import...
This is particularly useful when working out the consequences of an injury, like the spinal cord hemisection (Brown-Sequard syndrome) shown here in pink. The little human figure only shows the zone in which pain and temperature sensation are lost. There would also be losses of discriminative to...
Pictured here is a human heart, opened to expose the ventricles and AV valve. This particular patient suffered from extreme heart failure due to the over-stretching and enlargement of the left ventricle. The heart is a muscle and is divided into four major sections: the right and left atrium...
That wouldn’t be enough to declare the science of human anatomy a completed project, but we’d know a heck of a lot more than we do now. I’m not a multi-billionaire, and no-one on the planet is ever going to fund the vast study I just described. I think we’ll still get ...
Image Collection: Human Anatomy Picture of the Vagina 2009 WebMD, LLC. All rights reserved. The vagina is an elastic, muscular canal with a soft, flexible lining that provides lubrication and sensation. The vagina connects the uterus to the outside world. The vulva and labia form the entrance...
Image Collection: Human Anatomy Picture of the Vagina 2009 WebMD, LLC. All rights reserved. The vagina is an elastic, muscular canal with a soft, flexible lining that provides lubrication and sensation. The vagina connects the uterus to the outside world. The vulva and labia form the entrance...