Animal diversity Flashcards
bilateral symmetry
divisible into symmetrical halves
cephalisation
the differentiation of the front end of an organism into a definite head
deuterostome
developed an anus first
endoderm
the inner most layer of the germ layers
epiderm
thin layer of skin covering the dermis of plants or animals
gastrulation
early phase in the embryonic development of most animals
heterotroph
can not produce their own food, obtains nutrients by absorbing other organism
mesoderm
middle germ layer
protostome
mouth developed first
radial symmetry
symmetrical no matter what way you turn it
sagittal
vertical plane passing through the standing body from front to back
sessile
organism that aren’t able to move
anterior
part of body that is situated towards the front of another part
basal
primitive or ancestral group
detrivore
heterotrophs that obtain nutrients by consuming decomposing plant or animal parts
dorsal
refers to the back part of an organism
eumetazoan
subkingdom - all except sponges
ecdysis
mouthing of the cuticle in many invertebrates
indeterminate group
growth that is not terminated
metazoan
all animals having the body composed of cells differentrated into tissues and organism
ventral
refers to the front of an organism
true gut vs gastrovascular cavity
gastrovascular cavity has one opening whereas true gut is more advanced
diploblastic vs triploblastic
diploblastic - two layers, no mesoderm (sponges)
triploblastic - three layers
parasitism
+/-
