| Class | Body Covering | Circulatory System | Respiratory Organs | Nervous System | Reproduction Method, Embryo Development Character |
|---|---|---|---|---|---|
| Fish | 3 | ||||
| Amphibians | 3 | ||||
| Reptiles | 4 | ||||
| Birds | |||||
| Mammals |
Note: Some cells in the table are empty or contain partial information as per the provided image.