'Beasts' in the Bible

I said in mine heart concerning the estate of the sons of men, that God might manifest them, and that they might see that they themselves are beasts.

For that which befalleth the sons of men befalleth beasts; even one thing befalleth them: as the one dieth, so dieth the other; yea, they have all one breath; so that a man hath no preeminence above a beast: for all is vanity.

Who knoweth the spirit of the children of men? Doth it go upwards? and the spirit of the beasts, doth it go downwards to the earth?