'Man's' in the Bible

Blessed are you when men shall hate you, and when they shall exclude and mock you, and throw out your name as evil, for the Son of Man's sake.

He said to them, "Beware! Keep yourselves from covetousness, for a man's life doesn't consist of the abundance of the things which he possesses."

and desiring to be fed with the crumbs that fell from the rich man's table. Yes, even the dogs came and licked his sores.

They asked him, "Teacher, Moses wrote to us that if a man's brother dies having a wife, and he is childless, his brother should take the wife, and raise up children for his brother.