Body Plans & Symmetry
These invertebrates have radial symmetry and spiny skin.
What are echinoderms?
Sponges eat using these special cells that create a current and trap food.
What are collar cells?
Many animals in this phylum can regenerate lost body parts like arms.
What are echinoderms?
Snails and slugs belong to this class of mollusks.
What is Gastropoda?
Term for the tough outer covering made of chitin in arthropods.
What is the exoskeleton?
These three phyla have bilateral symmetry and include flatworms and roundworms.
What are Platyhelminthes, Rotifera, and Nematoda?
Cnidarians capture food using these stinging cells.
What are nematocysts?
This form of asexual reproduction, in which an embryo develops from an unfertilized egg, is not uncommon among arthropods.
What is parthenogenesis?
These mollusks are the smartest, with the most developed nervous systems.
What are cephalopods?
This term describes the type of symmetry where an animal can be divided into two identical halves along only one plane.
What is bilateral symmetry?
Which two phyla have radial symmetry?
What are Cnidaria and Echinodermata?
These animals eat by turning their stomachs inside out.
What are sea stars?
The simplest multicellular animals belong to this phylum.
What is Porifera?
These mollusks can produce pearls.
What are bivalves?
The system echinoderms use to move, breathe, and eat.
What is the water vascular system?
These invertebrates are asymmetrical and lack true tissues.
What is Porifera?
These worms use a muscular pharynx to suck up dead material and soil.
What are earthworms?
This group of invertebrates has a complete digestive system but only one opening for both food intake and waste removal.
What are Platyhelminthes?
Earthworms store food in the crop and grind it here.
What is the gizzard?
The class of arthropods with 8 legs and no antennae.
What is Arachnida?
This fluid-filled body cavity allows for organ development in more complex animals.
What is the coelom?
Mollusks like snails scrape up algae with this ribbon-like structure.
What is the radula?
These animals have both a polyp and medusa stage in their life cycle.
What are cnidarians?
Waste in earthworms is removed through these structures.
What are nephridia?
The name of the fused head and thorax in crustaceans.
What is the cephalothorax?