'Bowels' in the Bible

Behold, O LORD; for I am in distress: my bowels are troubled; mine heart is turned within me; for I have grievously rebelled: abroad the sword bereaveth, at home there is as death.

Mine eyes do fail with tears, my bowels are troubled, my liver is poured upon the earth, for the destruction of the daughter of my people; because the children and the sucklings swoon in the streets of the city.