Phylum Porifera and Cnidaria Flashcards
3 body plans for bilaterally symmetrical animals.
- Acoelomate- No Body Cavity
- Psuedocoelomate- develop a body cavity between the mesoderm and endoperm
- Coelomate- have a body cavity bounded by mesoderm
Sponges lack tissues and organs and are typically _____.
Asymmetrical
What phylums are protosomes?
Annelids, Mollusks, and Arthopods
What phylums are deuterostomes?
Echinodermata and Chordata
How do Phylum Porifera and Cnidaria feed?
Filter-feeding / ingestive-feeding heterotrophs
Grantia has a folded wall. These folds form Incurrent canals opening to the outside and ______ ______ opening to the central spongocoel.
Figure 36.4
Flagellated canals
Inside the sponge is the _____, a central cavity lined by flagellated cells called _____ (sometimes called collar cells).
Spongocoel, Choanocytes
Filtered water exits through a large hole in the end of the sponge called the _____.
Osculum
Crystalline skeletal structures in Phylum Porifera are..
Spicules
Creeping, mobile cells with many functions, including digestion and a rather amazing ability to differentiate into other cell types as needed.
Amoebocytes
The wall of sponges secrete the skeleton of calcareous spicules, siliceous spicules, or proteinaceous ____ fibers.
Spongin
In Phylum Cnidarian, a gelatinous ______ separates two body layers.
Mesoglea
Cnidarians capture their prey with tentacles. These tentacles are armed with stinging cells called _____ containing small, barbed harpoonlike structures called ______.
Cnidocytes, Nematocysts
Captured prey in cnidarians are pushed through the mouth into the ______ _____ (GVC).
Gastrovascular Cavity
Polyp
Cylindrical animals w/ mouth surrounded by tentacles atop the cylinder.
Attached to substrate, may be solitary or colonial.
Reproduce asexually by budding other polyps or continue the sexual cycle by budding immature medusae.
