BSC 2011C: Unit 4 Vocab

diploblastic

2 germ layers (ectoderm and endoderm)

triploblastic

3 germ layers (ectoderm, mesoderm, endoderm)

acoelomate

no coelom (body cavity)

eucoelomate/coelomate

body cavity completely lined with mesoderm

psuedocoelomate

partially lined with mesoderm and endoderm

protostome

mouth first, then anus

deuterostome

anus first, then mouth

porifera

sponges

cnidaria

jellyfish

platyhelminthes

flatworms

mollusca

snails, clams, squids, octopuses

bivalvia

clams, mussels, oysters

gastropoda

snails, slugs

cephalopoda

squid, octopus

annelida

segmented worms

nematoda

roundworms

arthropoda

insects, spiders, crustaceans

crustacea

crabs, lobsters

myriapoda

millipedes, centipedes

chelicerata

spiders, scorpions

trilobita

extinct

hexapoda

insects, butterflies, crickets

echinodermata

starfish, sea urchins

chordata traits

notochord, dorsal nerve chord, pharyngeal slits, post anal tail, thyroid gland

cephalochordata

lancelets

urochordata

sea squirts

agnathastomes

hagfish, lamprey

osteichthyes

bony jawed fish

chondrichthyes

sharks, rays, skates

urodela

salamander, lungless

anura

frogs, toads

apoda

caecilians

sphenodontia

tuataras

squamata

lizards, snakes

testudines

turtles

crocodillia

alligator, crocodile

ectotherms

body heat comes from environment

amniotic egg

allow to lay egg outside of water

endotherms

body heat is regulated internally

monotremes

lay leathery eggs, platypus

marsupials

complete development in pouch, kangaroo

placental

placenta connects fetus to mother, humans

viviparous

live birth; mammals

oviparous

egg laying; birds, fish, reptiles

ovoviviparous

egg develops in mother then hatched in utero and born alive; sharks, snakes, lizards

hibernation

winter torpor

estivation

summer torpor

male bird

ZZ

female bird

ZW