Information related to Animalia
Key to Animalia
Single cell protists
|Glossary for this page |
(all links are to Wikipedia articles)
- 3: Specialized cells absent, though different types of cells may be present. Digestive cavity absent. Muscles, nerves, and organs absent. Parazoa.
- 4: Specialized cells present. Digestive cavity present. Muscles, nerves, and organs present in some form. True tissues organized into germ layers. Enterozoa.
Orthonectida, Rhombozoa, Acoelomorpha, Chaetognatha, Hemichordata, Xenoturbellida, Platyzoa, Lophotrochozoa