--------------
Amoeba. | Cell. | |
-------------+----------------------------+---------------+--------------
Volvox. | Somatic and reproductive | | Reproductive.
| cells | |
-------------+----------------------------+---------------+--------------
Hydra. | Simple reproductive organs.| | Reproductive.
| Gastro vascular cavity. | |
| (Tissues). | |
-------------+----------------------------+---------------+--------------
Turbellaria. | D | Complex reproductive | Reproductive. | Digestive.
| e | Organs. Supra-oes. | |
| v | Ganglion and cords. | |
| e | Sense organs. | |
| l | Body wall.ns. | |
| o | | |
| p | | |
-------------+---|------------------------+---------------+--------------
Annelid. | O | Perivisceral Cavity. | |
| r | Intestine. Circulatory | |
| g | system. Nephridia. | |
| a | Visual eyes. | |
| n | | |
| s | | |
-------------+---+------------------------+---------------+--------------
Primitive | Notochord. Fins. | |
Vertebrate. | | |
-------------+----------------------------+---------------+--------------
Fish. | Backbone (incomplete). | Digestive. | Muscles.
| Paired Fins. Jaws from | |
| Branchial Arches. Simple | |
| heart. Air Bladder. Brain. | |
-------------+----------------------------+---------------+--------------
Amphibian. | Legs. Lungs. Cerebrum | | Muscles.
| increases from this | |
| form on. | |
-------------+----------------------------+---------------+--------------
Reptile. | Double heart. |