upper invertibrates unit test

class asteroidea

sea stars

carnivorous

good regeneration

penta-radical symmetry

class echinoidea

sea urchins

oval shaped body covered in calcareous (calcium carbonate)

no arms

detritivores (eats dead things)

class holothuroidea

sea cucumbers

long and cylindrical

no arms

detrius feeders

class crinoidea

sea lillies

long, feathery arms

filter feeders

class ophiuroidea

brittle star

penta-radical symmetry

long slender flexible arms

filter feeders/ detritivores

defining characteristics of echinoderms

marine only

penta-radical symmetry

good regeneration

water vascular system (tube feet): movement, feeding, respiration

annelida:

feeding methods

ranging from filter feeders to predators

decomposers use a ___ to feed

sticky mucous covered pharynx

pharynx

moves food and soil into esophagus

crop

stores food

gizzard

where food is ground into smaller pieces

intestine

absorbs food

phylum annelida: first phylum with __

circulatory system

what circulatory system does annelida have

closed circulatory system: blood is contained in a network of blood vessels

what pumps blood through dorsal and ventral blood vessels

aorticarches

how do aquatic mollusks breathe

using gills inside their mantle cavity

how do slugs breathe

mantle cavity with blood vessels (need to be moist)

3 defining characteristics of mollusks

large ventral muscular foot

visceral mass located dorsal to foot

tissue layer called mantle covers visceral mass

class gastropoda

snails, slugs

torsion: rotation of digestive system

lives in all water and land

single spiral shell

class bivalvia

2 hinged shells

clams, oysters

filter feeders, sessile

uses gills for respiration and filter feeding

class cephalopoda

motile predators

reduced shell

octopus, squid

complex eyes

class chilopoda

centipedes

repeating segments

body segments have 1 pair of legs

setae modified to crude appendages (only in mouthparts)

class diplopoda

millipedes

exoskeleton

unspecialized appendages

body segements have 2 pairs of legs

class crustacea

developed body regions: head, thorax, abdomen

fused head and thorax called “cephalothorax”

excellent sense organs and behavior begins

class arachnida

spiders, scorpions, ticks

fueed cephalothorax

4 pairs of legs

book lungs

class insecta

grasshoppers

70% of the animal kingdom

seperate body region and 3 pairs of legs

only invertibrate that can fly

respiration with tracheal tubes