No refuge could save the hireling and slave. From the terror of flight or the gloom of the grave: And the star-spangled banner in triumph doth wave. O'er the land of the free and the home of the brave. O thus be it ever when free-men shall stand. Between their lov'd home and the war's desolation; Blest with vict'ry and peace, may the heav'n-rescued land.
Chordates are animals with backbones. Animal groups in the chordate phylum include fish, amphibians, reptiles, birds and mammals. Animals with backbones are the most highly evolved groups of animals, the most complex and complicated. They have interior skeletons and have bilateral symmetry. They have more advanced brains.
A phylum is a large group of related animals or of related plants (or of related bacteria, etc.) Some of the phyla will make sense to you: People and dogs and whales and fish and snakes and birds are all in chordata because they all have a spinal chord.