# Now I want

"Because of this, I want" 

# is the head of

"has authority over". Paul uses "head" for authority in verse 3 and also to refer to a person's actual head in verse 4 and following. Since the verses are so close together, it is likely that Paul intentionally used "head" in this way. 

# a man is the head of a woman

"men are to have authority over women" or  "the husband is to have authority over the wife"