News tagged with sex

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Is sex in later years good for your health?

Having sex frequently - and enjoying it - puts older men at higher risk for heart attacks and other cardiovascular problems. For older women, however, good sex may actually lower the risk of hypertension.

Sep 06, 2016
popularity161 comments 4

Lowered birth rates one reason why women outlive men

Using unique demographic records on 140,600 reproducing individuals from the Utah Population Database, a research team led from Uppsala University has come to the conclusion that lowered birth rates are one reason why women ...

Apr 18, 2016
popularity28 comments 1

A deeper take on our sexual nature

The organs in our body may have a sexual identity of their own, new research suggests. The idea that our organs could be "male" or "female" raises the possibility that women and men may need different treatments as a result. ...

Feb 18, 2016
popularity215 comments 0

Sex

In biology, sex is a process of combining and mixing genetic traits, often resulting in the specialization of organisms into male and female types (or sexes). Sexual reproduction involves combining specialized cells (gametes) to form offspring that inherit traits from both parents. Gametes can be identical in form and function (known as isogametes), but in many cases an asymmetry has evolved such that two sex-specific types of gametes (heterogametes) exist: male gametes are small, motile, and optimized to transport their genetic information over a distance, while female gametes are large, non-motile and contain the nutrients necessary for the early development of the young organism.

An organism's sex is defined by the gametes it produces: males produce male gametes (spermatozoa, or sperm) while females produce female gametes (ova, or egg cells); individual organisms which produce both male and female gametes are termed hermaphroditic. Frequently, physical differences are associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience.

This text uses material from Wikipedia, licensed under CC BY-SA

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