Man

A group of twenty men

An old man smiling in Bihar, India

A man is an adult male human. Culturally, he is considered the opposite of a woman. People use the word "man" (one man, two or more men) to talk about gender. Manhood is the period in a male's life after he changes from a boy. A boy is a male child; a female child is called a girl. After boys reach maturity, they can be called a man.

Like most other male mammals, a man inherits an X chromosome from his mother and a Y chromosome from his father. What makes someone a man is not agreed on globally.

Biology

Human male reproductive anatomy and surroundings

There are some sexual differences between a man and a woman. Men have sex organs which we call "external" (not inside the body). But many parts of the male reproductive system are internal too. The study of male reproduction and sex organs is andrology.

Image of a man and a woman with body parts labeled

Men normally have the same illnesses as women, but there are some sexual illnesses which men have only, or more often.

There are more differences between men and women, not only sexual differences.

• Some people say men, as a group, are more aggressive than women; they want to fight more. But most research has found that men and women are equally aggressive.
• In modern western society, few men wear make-up or clothing of the sort women traditionally wear.

Some examples of secondary sexual characteristics in male humans:

• more pubic hair
• more facial hair
• more body hair
• larger hands and feet than women
• broader shoulders and chest
• narrower hips
• larger skull and bone structure
• larger brain
• greater muscle mass
• a more visible Adam's apple and deeper voice
• a longer shinbone

Men are usually taller than women. In 1996, the average height of men around the world was 171 cm.

Biology is not the sole factor which makes someone a man and to be perceived as such. Cultural and social referents are used to express and perceive one's manhood, which are independent of assigned sex at birth. Some men have hormone or chromosomal differences. There are transgender man, who were assigned female at birth, but identify as male and may undergo hormonal therapy and surgeries to transition their sex. Men may have intersex conditions. Intersex people may also be transgender.

Related pages

• Human
• Male
• Female
• Woman
• Boy
• Girl
• Violence against men
• International Men's Day
• Masculinity
• Misandry