Chordate of the three subdivisions of chordates, all have distinct skulls. They include the hagfish, which have no vertebrae. Michael J. Benton commented that "craniates are characterized by their heads, just as chordates, or possibly all deuterostomes, are by their tails". Most craniates are vertebrates, in which the notochord is replaced by the vertebral column. These consist of a series of bony or cartilaginous cylindrical vertebrae, generally with neural arches that protect the spinal cord, and with projections that link the vertebrae. However hagfish have incomplete braincases and no vertebrae, and are therefore not regarded as vertebrates, but as members of
People for the Ethical Treatment of Animals pain, fear and loneliness. We're asking people to recognize that what Jews and others went through in the Holocaust is what animals go through every day in factory farms." And analogies between animal rights and the Holocaust had been initiated by the prominent Jewish author Isaac Bashevis Singer. In 2005, the NAACP criticized the "Are Animals the New Slaves?" exhibit, which showed images of African-American slaves, Native Americans, child laborers, and women, alongside chained elephants and slaughtered cows. PETA's "It's still going on" campaign features newspaper ads comparing widely publicized murder-cannibalization cases to the deaths of animals in slaughterhouses. The