Profera and Cnidaria Flashcards
Which type of animal is classified as Porifera?
Sponges
Radial symmetry
Body parts arranged around central axis
Bilateral symmetry
Body divided into Left and right planes
What is the name for the bilateral plane and how does it help the animal’s function?
Sagittal plane, helps with directional movement
What are animals called with bilateral symmetry?
Bilaterians
What class is sponges in?
Parazoa
What class do animals fall into besides sponges?
Eumetazoa
How many germ layers does Eumetazoa have?
2 or 3
Name for two germ layers and name the layers
Diploblastic - ectoderm and endoderm
Animal with three germ layers. What are they?
Triploblastic
Ectoderm
Mesoderm
Endoderm
Describe the germ layers and basic interior structure of Cnidaria
Diploblastic with tissues but no organs
Define Acoelomate
3 germ layers with no body cavity
Flatworms, flukes and tape worms are what?
Acoelomates : planarians
Define Coelomates
Body cavity is called a coelom that is surrounded by the mesoderm
Pseudocoelomates
A pseudocoelom that forms between the mesoderm and the endoderm during development
Protostomes
3 germ layers, bilateral symmetry
Mouth forms first
Deuterostomes
Only Echinoderms and Chordates
Anus forms first, embryonic cells divide by radial cleavage
Cephalization
Presence of a head
Parazoa
Animals with no tissues or germ layers
Eumetazoa
Animals with tissues and 2 or 3 germ layers
Diploblastic
2 germ layers
Triploblastic
3 germ layers
Acoelomate
3 germ layers, no body cavity
Pseudocoelomate
Body forms between the mesoderm and endoderm
Coelomate
Body cavity surrounded by the mesoderm
Name the body cavity in a Coelomate
The Coelom
Protostome
3 germ layers, bilateral symmetry and mouth forms from the Blastopore
Deuterostome
Only includes: Echinoderms and Chordates. Blastopore becomes anus, All Deuterostomes are Coelomate.
Epithelium
Outside layer of a sponge
Mesohyl
Gelatinous middle layer consisting of live and dead cells
Choanocytes
Inner chamber : collar cells
Spongin
Protein fibers that make up a flexible endoskeleton