About 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 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, thus exhibiting greater differences between the sexes. These include greater muscle mass, the growth of facial hair and a lower body fat composition.

Man

man in gray crew neck shirt
man in gray crew neck shirt
man wearing eyeglasses
man wearing eyeglasses
man wearing blue shirt
man wearing blue shirt
a man on a climbing wall doing a trick
a man on a climbing wall doing a trick
man standing on beach during daytime
man standing on beach during daytime
silhouette of a man facing the sunset
silhouette of a man facing the sunset
man sitting on white concrete building during daytime
man sitting on white concrete building during daytime
man using smartphone on chair
man using smartphone on chair
man in black jacket smiling
man in black jacket smiling
a man climbing up the side of a climbing wall
a man climbing up the side of a climbing wall
black haired man making face
black haired man making face
man in black suit jacket
man in black suit jacket
man standing on top of mountain
man standing on top of mountain
person standing near the stairs
person standing near the stairs
a man climbing up the side of a rock wall
a man climbing up the side of a rock wall
man in black suit standing on sidewalk during daytime
man in black suit standing on sidewalk during daytime
man in gray pullover hoodie closed eyes while heads up
man in gray pullover hoodie closed eyes while heads up
man wearing green collared top
man wearing green collared top