Flashcards
Between 95 and 99 percent of animals are this.
Invertebrate
Hard or tough outer coverings that provide a framework of support.
Exoskeletons
Internal skeletons
Endoskeleton
Animal with a backbone
Vertebrate
Born with both sets of genitalia
Hermaphrodite
Fertilized egg
Zygote
When the sperm and egg combine inside the body
Internal fertilization
When egg and sperm combine outside the body
External Fertilization
After mitosis of the embryo they form fluid filled balls called this.
Blastula
The blastula continuing mitosis
Gastrula
Inner layer of cells in Gastrula
Endoderm
Outer layer of cells in the Gastrula
Ectoderm
Cell division continues in animals this forms between the endoderm and ectoderm
Mesoderm
Describes the similarity or balance among body structures of organisms.
Symmetry
This symmetry can be divided along any plane through a central axis into roughly equal halves.
Radial Symmetry
Can be divided into mirror halves
Bilateral symmetry
If its bilateral it has these
Anterior, Posterior
If it has Anterior and Posterior it has this body plan
Cephalization
In addition to Cephalization with bilateral symmetry all animals have this
Dorsal
The underside
Ventral
Fluid filled cavity
coelom
Fluid filled cavity that develops between the mesoderm and the endoderm
pseudocoelomates
Animals that do not have coelom
Acoelomates
Mouth develops first
Protostomes
Anus develops first
Deuterostomes
Gets food by filtering water
Filter Feeder
Do not move
Sessile
Stingers on cnidarian tentacles
cnidocytes
Inner cell layer of cnidarians surround a space in the stomach
Gastrovacular
Nervous system of a cnidarian
Nerve net
Two body forms of cnidarians
Polyp, Medusa
