News tagged with sex
Related topics: men
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 and is available under the GNU Free Documentation License.
Men experience a higher burden of disease and lower life expectancy than women, but policies focusing on the health needs of men are notably absent from the strategies of global health organisations, according to a Viewpoint ...
Health May 16, 2013 | not rated yet | 0
Researchers at the University of Cincinnati (UC) have found that the race and sex of study personnel can influence a patient's decision on whether or not to participate in clinical research.
Health May 17, 2013 | not rated yet | 0
The Obama administration and federal courts are wrangling over changes to the regulations governing access to emergency contraceptives. The administration supports new rules that would allow girls as young ...
Medications May 14, 2013 | not rated yet | 0
What is the reason for the widely reported fact that men are more likely than women to die of cancer? New evidence from population studies suggests that free testosterone could be a key driver of cancer aggressiveness in ...
Cancer May 14, 2013 | 5 / 5 (1) | 0