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Man
A man is an adult male human. Prior to adulthood, a male human is referred to as a boy.

Like most other male mammals, a man's genome typically inherits an X chromosome from his mother and a Y chromosome from his father. The male fetus generally produces larger amounts of androgens and smaller amounts of estrogens than a female fetus. This difference in the relative amounts of these ♥♥♥ steroids is largely responsible for the physiological differences that distinguish men from women. During puberty, hormones which stimulate androgen production result in the development of secondary ♥♥♥♥♥♥ characteristics, thus exhibiting greater differences between the sexes. However, there are exceptions to the above for some transgender and intersex men.

Etymology and terminology

The English term "man" is derived from a Proto-Indo-European root *man- (see Sanskrit/Avestan manu-, Slavic mǫž "man, male").[1] More directly, the word derives from Old English mann. The Old English form had a default meaning of "adult male" (which was the exclusive meaning of wer), though it could also signify a person of unspecified gender. The closely related Old English pronoun man was used just as it is in Modern German to designate "one" (e. g., in the saying man muss mit den Wölfen heulen).[2]

Biology

In human beings, the ♥♥♥ of an individual is determined at the time of fertilization by the genetic material carried in the sperm cell. If a sperm cell carrying an X chromosome fertilizes the egg, the offspring will typically be female (XX). On the other hand, if a sperm cell carrying a Y chromosome fertilizes the egg, the offspring will typically be male (XY). Persons whose anatomy or chromosomal makeup differ from this pattern are referred to as intersex.

Like most other male mammals, a man's genome typically inherits an X chromosome from his mother and a Y chromosome from his father. The male fetus produces larger amounts of androgens and smaller amounts of estrogens than a female fetus. This difference in the relative amounts of these ♥♥♥ steroids is largely responsible for the physiological differences that distinguish men from women.

Humans exhibit ♥♥♥♥♥♥ dimorphism in many characteristics, many of which have no direct link to reproductive ability, although most of these characteristics do have a role in ♥♥♥♥♥♥ attraction. Most expressions of ♥♥♥♥♥♥ 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.

Primary ♥♥♥ characteristics (or ♥♥♥ organs) are characteristics that are present at birth and are integral to the reproductive process. For men, primary ♥♥♥ characteristics include the ♥♥♥♥♥ and ♥♥♥♥♥♥♥♥♥. Secondary ♥♥♥ characteristics are features that appear during puberty in humans.[3][4] Such features are especially evident in the sexually dimorphic phenotypic traits that distinguish between the sexes, but—unlike the primary ♥♥♥ characteristics—are not directly part of the reproductive system.[5][6][7] Secondary ♥♥♥♥♥♥ characteristics that are specific to men include:

Facial hair;[6]
Chest hair;[8]
Broadened shoulders;[9]
An enlarged larynx (also known as an Adam's apple);[9] and
A voice that is significantly deeper than the voice of a child or a woman.[6]

Reproductive system

The male reproductive system includes external and internal genitalia. The male external genitalia consist of the ♥♥♥♥♥, the male urethra, and the scrotum, while the male internal genitalia consist of the testes, the prostate, the epididymis, the seminal vesicle, the vas deferens, the ejaculatory duct, and the bulbourethral gland.[10]

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 study of male reproduction and associated organs is called andrology.
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