Import of Man from USA

A man is an adult male human. Before adulthood, a male child or adolescent is referred to as a boy. Like most other male mammals, a man's genome usually inherits an X chromosome from the mother and a Y chromosome from the father. Sex differentiation of the male fetus is governed by the SRY gene on the Y chromosome. During puberty, hormones which stimulate androgen production result in the development of secondary sexual characteristics that result in even more differences between the sexes. These include greater muscle mass, greater height, the growth of facial hair, and a lower body fat composition. Male anatomy is distinguished from female anatomy by the male reproductive system, which includes the testicles, sperm ducts, prostate gland and epididymides, and penis. Secondary sex characteristics include a narrower pelvis and hips, and smaller breasts and nipples. Throughout human history, traditional gender roles have often defined masculinity and men's activities and opportunities, furthering the prevalence of patriarchal society. This makes men have considerable privileges and power, particularly over women, enforcing stringent masculine dominance and hierarchies throughout society. Men are over-represented as both perpetrators and victims of violence. Men often are directed into professions with high mortality rates. Mostly men face conscription into military service. Many religious doctrines stipulate certain rules for men, such as religious circumcision. Critique of the impact of these roles has produced changes toward gender equality, and has been addressed by the diverse men's movement. Trans men have a gender identity that does not align with their female sex assignment at birth, while intersex men may have sex characteristics that do not fit typical notions of male biology.