- Vertebral column
- Jaws
- Paired appendages
- Pharyngeal slits at some developmental stage
No category found.
- Excretion
- Respiration
- Locomotion and feeding
- Reproduction
- Open
- Closed
- Absent
- Reduced
- Annelida
- Mollusca
- Arthropoda
- Echinodermata
- Circular muscles
- Longitudinal muscles
- Exoskeleton
- Hydrostatic skeleton
- Coelom
- Mesoderm
- Mesoglea
- Peritoneum
- Eukaryotic cells
- Multicellularity
- Heterotrophic nutrition
- Ability to reproduce sexually
- External fertilization
- Rapid development of young outside the mother
- Prolonged internal development of offspring
- Asexual reproduction
- Hollow bones
- Presence of a urinary bladder
- Feathers
- Powerful flight muscles
- Bone
- Keratin
- Chitin
- Cartilage
- Reproduce asexually
- Regenerate lost body parts
- Change sex
- Produce bioluminescence
- Gastropoda
- Bivalvia
- Cephalopoda
- Polyplacophora
- Digestion
- Respiration
- Sensory perception
- Locomotion
- Longitudinal muscles
- Circular muscles
- Both longitudinal and circular muscles
- No muscles
- Radial symmetry
- High surface area for filter feeding
- Rapid movement
- Complex organ systems
- Carnivora
- Rodentia
- Primates
- Cetacea
