animalia key terms Flashcards
eumetazoa
‘true’ animals
excludes porifera
coelenterates
paraphyletic group
contains cnidaria and ctenophora
diploblastic
bilateria
animals with bilateral symmetry
protostomia
animals where the blastopore becomes the mouth
spiral cleavage
schizocoelom
ecdysozoa
protostomes that grow by shedding their outer integument
ecdysis
spiralia
protostomes that do not grow via ecdysis
gnathifera
spiralians with complex jaws made of chitin
lophotrochozoa
spiralians which have both a lophophore and a trochophore larva
deuterostomia
animals where the blastopore becomes the anus
radial cleavage
enterocoelom
chordata
deuterostomes that possess a notochord
a hollow, dorsal nerve cord
an endostyle, pharyngeal slits and a post anal tail
ambulacraria
deuterostome group including the echinoderms and hemichordates
body plans of animals
diploblastic
- blastopore becomes mouth and anus
triploblastic schizocoelom
- blastopore becomes mouth
triploblastic enterocoelom
- blastopore becomes anus
diploblastic
ectoderm and endoderm
has a gastrovascular cavity
blastopore forms mouth and anus
coelenterates
basal metazoans - sponges, jellyfish and corals
triploblastic (schizocoelom)
ectoderm and endoderm
mesoderm - new set of cells form inside
endoderm pushes through to create donut shape
blastopore becomes MOUTH
- anus forms later
coelom - cavity inside mesoderm
SPIRAL cleavage
protostomes
molasses, arthropods and annelids
triploblastic (enterocoelom)
ectoderm and endoderm
mesoderm
endoderm buds off
similar to other but different origin of mesoderm
blastopore becomes ANUS
- mouth forms later
RADIAL cleavage
deuterostomes
starfish and vertebrates
