Women's sexual and reproductive organs | Sexuality and cancer | Cancer Research UK
All rights reserved. This picture of two mating insects comes with an unexpected twist. The one on top is a female, and she has a penis. The one on the bottom is a male, and he has the equivalent of a vagina. During sexual bouts that can last for 40 to 70 hours , she penetrates him and uses her genitals not to deliver sperm, but to collect it. The 3-millimetre-long species is called Neotrogla curvata , and it lives in Brazilian caves.
The adolescent spurt in skeletal and muscular dimensions is closely related to the rapid development of the reproductive system that takes place at this time. There are a few boys, it will be noticed, who do not begin their spurts in height or penis development until the earliest maturers have entirely completed theirs. At ages 13, 14, and 15 there is an enormous variability among any group of boys, who range all the way from practically complete maturity to absolute preadolescence.
It's February The location; a hospital emergency department within the city of Seoul, in South Korea. A year-old woman has arrived complaining of sharp pains in her mouth and clutching a chunk of squid from her seafood dinner. The physicians examining her find what appear to be a number of tiny writhing animals stuck to her tongue, cheeks and gums.