Bilateria Flashcards
What develops first in protostomia?
Mouth
Where does the protostomia mesoderm develop?
Inside the embryo
What type of development do protostomia have?
Determinate
What type of cleavage do protostomia blastomere have?
Spiral cleavage
Where is the protostomia nerve cord relative to the gut?
Ventral
What develops first in deuterostomia?
Anus
Where does the deuterostomia mesoderm develop?
From the inside of the blastomere
What type of development do deuterostomia have?
Indeterminate
What type of cleavage do deuterostomia blastomere have?
Radial cleavage
Where is the deuterostomia nerve cord relative to the gut?
Dorsal
Define diploblastic and give an example
Two layer. e.g. cnidarians
Name the three types of triploblastic organisms
Coelomate, acoelomate, pseudocoelomate
Define coelom
Principle body cavity in animals
Define coelomate and give an example
Fluid-filled cavity with mesoderm. e.g. most bilaterians
Define acoelomate and give an example
No coelom cavity. e.g. flatworms
