Men

A man is a male human. The term man (irregular plural: men) is used for an adult human male, while the term boy being the usual term for a human male child or adolescent human male. However, man is sometimes used to refer to humanity as a whole. more...

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Sometimes it is also used to identify a male human, regardless of age, as in phrases such as \"Men's rights\".

The term \"manhood\" is used to refer variously to the condition of being male, male sexuality, or the actual reproductive organs.

Etymology

The term man (from Proto-Germanic *mannaz \"man, person\") and words derived from it can designate any or even all of the human race regardless of their sex or age. This is indeed the oldest usage of \"man\". The word developed into Old English man, mann \"human being, person,\" (cf. also German Mann, Old Norse maðr, Gothic manna \"man\").

Biology and gender

Humans exhibit sexual dimorphism in many characteristics, many of which have no direct link to reproductive ability, although most of these characteristics do have a role in sexual attraction. Most expressions of sexual dimorphism in humans are found in height, weight, and body structure, though there are always examples that do not follow the overall pattern. For example, men tend to be taller than women, but there are many people of both sexes who are in the mid-height range for the species.

Some examples of male secondary sexual characteristics in humans, those acquired as boys become men or even later in life, are:

more pubic hair around penis and under arms; more facial hair; larger hands and feet than women; broader shoulders and chest; heavier skull and bone structure; greater muscle mass; a prominent Adam's apple and deeper voice;

Reproductive system

The sex organs of a man are part of the reproductive system, consisting of the penis, testicles, vas deferens, and the prostate gland. The male reproductive system's function is to produce semen which carries sperm and thus genetic information that can unite with an egg within a woman. Since sperm that enters a woman's uterus and then fallopian tubes goes on to fertilize an egg which develops into a fetus or child, the male reproductive system plays no necessary role during the gestation. The concept of fatherhood and family exists in human societies. The study of male reproduction and associated organs is called andrology.

Karyotype

The normal human karyotypes contain 21 pairs of autosomal chromosomes and one pair of sex chromosomes. Normally karyotypes for men have both an X and a Y chromosome denoted 46,XY.

Illnesses

In general, men suffer from many of the same illnesses as women. In comparison to women, men suffer from slightly more illnesses. Male life expectancy is slightly lower than female life expectancy, although the difference has narrowed in recent years.

Read more at Wikipedia.org