ch 9 quiz #2 Flashcards
8 invertebrate phyla
-porifera
-cnidaria
-platyhelmenthis
-molluscs
-nematoda
-annelida
-arthropoda
-echinoderms
porifera (outstanding features and an organism)
sponges, no true tissue, are filter feeders, spicules
Cnidaria (outstanding features and an organism)
jellyfish, radial symetry, true tissue, diploblastic, cnidocytes (stinging cells)
platyhelmenthis
tapeworms, acoelamates, bilateral symetry, triploblastic
molluscs (outstanding features and an organism)
clams, coelamates, bilateral symmetry, triploblastic, visceral mass, radula
nematoda (outstanding features and an organism)
heartworms, pseudocoelamates, unsegmented, hydro skeleton, have true tissue
annelida (outstanding features and an organism)
earthworms, coelamates, segmented, closed circulatory system
arthropoda (outstanding features and an organism)
spiders, ecdosozoans (they molt), jointed, bilateral symmetry, exoskeleton
echinoderms (outstanding features and an organism)
starfish, deuterostomes, coelamates, triploblastic, water vascular system, endoskeleton with plates
diploblastic vs. triploblastic
diploblastic: 2 germ layers (ectoderm and endoderm)
triploblastic: 3germ layers (ectoderm, mesoderm, endoderm)
radial vs. bilateral symmetry
radial: vertical line through center makes identical halves
bilateral: vertical line drawn through middle makes mirror images
aceolamates
have no body cavity
pseudocoelamates
have a body cavity lined with mesoderm on one side
coelamates
have a body cavity lined with mesoderm
protostome vs. deuterostome
protostome: blatospore becomes the mouth
deuterostome: blastospore becomes the anus