theme . the ptolemaic kingdom and the punics began acquiring african elephants for the same purpose, as did numidia and the kingdom of kush . the animal used was the north african elephant (loxodonta africana pharaohensis) which would become extinct from overexploitation .[ citation needed ] these animals...
, but vary greatly in complexity. [ ] the only multicellular animals that have no nervous system at all are sponges , placozoans , and mesozoans , which have very simple body plans. the nervous systems of the radially symmetric organisms ctenophores (comb jellies) and cnidarians (which include anemones...