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.
Medusa
Free-floating and umbrella-shaped. Mouth points downward and are surrounded by hanging tentacles.
Produce and release eggs and sperm into water for fertilization, although some retain eggs.
After medusa fertilization the zygote develops into a swimming mass of ciliated cells called a _____ _____. A planula eventually settles to the substrate and develops into a polyp.
Planula Larva
Gastrozooid
Feeding Polyps
Gonozooid
Reproductive Polyps
All sponges of Porifera and cnidarians of Cnidaria are _____ and multicellular.
Eukaryotic
_____ is a common tubular sponge w/ a folded body-wall filled with pores for filtering water.
Grantia
Fibers of spongin (made of protein) compose the skeleton of common bath sponges such as _____.
Spongia
What are the 4 classes of Phylum Cnidaria?
Hydrozoa
Scyphozoa
Cubozoa
Anthozoa
What kind of symmetry do cnidarians show?
Radial Symmetry
All cnidarians are _____ that capture their prey.
Carnivores
What are the 4 genus’s of Hydrozoa?
Hydra
Obelia
Physalia
Gonionemus
What are the 2 genus’s of Scyphozoa?
Aurelia
Cassiopeia
What are the 2 genus’s of Anthozoa?
Metridium (anemone)
Corals
When pieces of basal disk tear away from a moving anemone the pieces form a new individual. What type of asexual reproduction is this?
Fragmentation
Anthozoa: polyp or medusa stage?
Polyp only
Scyphozoa: polyp or medusa stage?
Both, medusa dominant
Hydrozoa: polyp or medusa stage?
Both, polyp dominant
Cubozoa: polyp or medusa stage?
Medusa only
