'Bowels' in the Bible

Therefore my bowels sound like a harp for Moab, and mine inward parts for Kirheres.

and thy seed would have been as the sand, and the offspring of thy bowels like the gravel thereof: their name should not have been cut off nor destroyed from before me.

Listen, O isles, unto me; and hearken, ye peoples from afar. Jehovah hath called me from the womb; from the bowels of my mother hath he made mention of my name.

Look down from the heavens, and behold from the habitation of thy holiness and of thy glory! Where is thy zeal and thy strength, the sounding of thy bowels and of thy tender mercies? Are they restrained toward me?