Porifera
These specialized cells create water currents and filter food particles in sponges
choanocytes
Cnidarians have these stinging cells used for capturing prey and defense.
cnidocytes
Platyhelminthes are unique for lacking this body system, making them rely on diffusion.
circulatory system
The outer protective layer of nematodes that they molt as they grow.
cuticle
The primary characteristic that distinguishes Porifera from other invertebrates.
lack of true tissues
The structural support of sponges is provided by these needle-like or fiber-based components.
spicules or spongin
The two main body forms of cnidarians.
polyp and medusa
These free-living flatworms are often found in freshwater environments.
planarians
Unlike flatworms, nematodes have this type of digestive system.
complete digestive system
Cnidarians use this type of symmetry.
radial symmetry
Sponges feed by this method, where they filter tiny particles from the water what is this called.?
filter feeding
This class includes true jellyfish, which spend most of their life cycle in the medusa stage.
Scyphozoa
This parasitic flatworm causes schistosomiasis in humans
Schistosoma
This nematode parasite is commonly transmitted through undercooked pork.
Trichinella spiralis
The term for animals with three germ layers, which includes Platyhelminthes and Nematoda.
triploblastic
The process where sponges reproduce asexually by breaking off small parts that develop into new individuals.
budding
Corals build massive reef structures using this mineral.
calcium carbonate
Tapeworms use this structure to attach to their host’s intestine.
scolex
The condition caused by filarial worms that leads to severe swelling, often in the limbs.
elephantiasis
The type of body cavity found in Nematoda but not in Platyhelminthes.
pseudocoelom
This sponge class contains species that have calcium carbonate spicules.
Calcarea
The Portuguese Man o’ War is a member of this cnidarian class, known for colonial polyps.
Hydrozoa
This class of Platyhelminthes consists entirely of parasites.
Trematoda
The model organism Caenorhabditis elegans belongs to this phylum.
Nematoda
The evolutionary advantage of having a complete digestive system, as seen in Nematoda.
more efficient digestion and nutrient absorption