- Open
- Closed
- Absent
- Both open and closed
No category found.
- Gills
- Lungs
- Book lungs
- Moist skin
- Parapodia
- Setae
- Pseudopods
- Flagella
- Absence of coelom
- Jointed appendages
- Metameric segmentation
- Radial symmetry
- Arthropoda
- Mollusca
- Annelida
- Nematoda
- Liver fluke
- Hookworm
- Tapeworm
- Planaria
- Incomplete (one opening)
- Complete (two openings)
- Absent
- Sac-like
- Acoelomates
- Coelomates
- Pseudocoelomates
- Eucoelomates
- Platyhelminthes
- Annelida
- Nematoda
- Arthropoda
- Planaria
- Earthworm
- Tapeworm
- Leech
- Nephridia
- Malpighian tubules
- Flame cells
- Kidneys
- Cellular
- Tissue
- Organ
- Organ system
- Radial
- Asymmetry
- Bilateral
- Spherical
- Nematoda
- Annelida
- Platyhelminthes
- Mollusca
- Cnidocytes
- Choanocytes
- Colloblasts
- Nematocysts
- Feeding
- Reproduction
- Locomotion
- Defense
- Cnidaria
- Ctenophora
- Platyhelminthes
- Nematoda
- Intracellular
- Extracellular
- Both intracellular and extracellular
- Absent
- Colloblasts
- Flame cells
- Nematocyst
- Osculum
