- Sharks
- Rays
- Bony fish
- Lampreys
No category found.
- Chondrichthyes
- Osteichthyes
- Agnatha
- Amphibia
- Ampulla
- Tube feet
- Madreporite
- Stone canal
- Annelids
- Arthropods
- Molluscs
- Echinoderms
- Nematoda
- Annelida
- Trematoda (for flukes) and Cestoda (for tapeworms)
- Gastropoda
- Porifera
- Cnidaria
- Platyhelminthes
- Mollusca
- Jellyfish
- Sponge
- Flatworm
- Earthworm
- Reptiles
- Amphibians
- Birds
- Mammals
- Hair/fur
- Mammary glands
- Viviparity
- Poikilothermy (cold-blooded)
- Furcula (wishbone)
- Keel
- Pygostyle
- Sternum
- Cold environments
- Aquatic life
- High metabolic rate for flight
- Burrowing
- Lizards
- Snakes
- Crocodilians
- Turtles and tortoises
- Endoderm
- Mesoderm
- Ectoderm
- Both ectoderm and mesoderm
- Anura
- Caudata
- Gymnophiona
- Testudines
- Respiration
- Digestion
- Detecting water movements and vibrations
- Reproduction
- Exoskeleton
- Notochord replaced by vertebral column
- Radial symmetry
- Absence of circulatory system
- Metamorphosis
- Regeneration
- Molting (Ecdysis)
- Hibernation
- A complete digestive system
- Flame cells
- Cnidocytes
- A true coelom
