All animals are members of the Kingdom Animalia, also called Metazoa. This Kingdom does not contain the prokaryotes (Kingdom Monera, includes bacteria, blue-green algae) or the protists (Kingdom Protista, includes unicellular eukaryotic organisms). All members of the Animalia are multicellular, and all are heterotrophs (that is, they rely directly or indirectly on other organisms for their nourishment). Most ingest food and digest it in an internal cavity.
/http%3A%2F%2Fekladata.com%2F_LwD5XEsMHAH2jFMwYQA1VQDEEw.jpg)
/http%3A%2F%2Fekladata.com%2FhOwYFMHDuHqGm7bUg4JEM74DiVE.jpg)
/http%3A%2F%2Fekladata.com%2FFK2Uir0UKC3-tfa1q7O9kB_9Y2k.jpg)
/http%3A%2F%2Fekladata.com%2FKOyEhpgE9Jnh0VwXkrlmBR2lNqQ.jpg)