Life Sciences 11 Phylum Unit Test

Filter Feeder

Catches food through filtering food through water for Porifera

Collar cells

Catches and draws food in for Porifera

Amoebocytes/amoeboid cells

Collects bits from collar cells to catch in vacules and transfer to other cells in Porifera. Not sessile.

Sessile

does not move

Porifera level of organization

Cellular

Porifera symmetry

asymmetrical

Porifera cephalization

absent

Porifera body cavity

absent

Porifera digestive system

absent

Porifera circulatory system

absent

Porifera respiratory system

absent

Porifera reproduction

asexual and sexual

Spicules

gives sponges its shape, supports soft parts of the sponge.

Porifera support

Spicules

porifera examples

all sponges

2 forms of Cnidarians

Medusa and polyp stages

Zooxanthellae

photosynthetic algae that lives in Cnidarian polyps. Gives them colour.

Cnidocytes

Contain nematocysts that is important for prey capture. Defining feature of Cnidaria

Nematocysts

When triggered, an organelle bursts and releases a coiled thread that injects venom. For Cnidarian defense.

Cnidarian commensalism

Fish get protected

Cnidarian mutualism

Fish get protection AND Cnidarian gets cleaned and fed

Distinguishing features to Cnidaria?

95% water, no bones, gelatinous, some are immortal, originated 700-500 mya

Cnidarian organization

tissue

Cnidarian symmetry

radial

Cnidarian cephalization

absent

Cnidarian body cavity

hollow

Cnidarian digestive system

gastrovascular

Cnidarian circulatory system

absent

Cnidarian respiratory system

absent

Cnidarian reproduction

sexual and asexual

Cnidarian support

hydroskeleton

Cnidarian examples

jellyfish, sea anemones

Platyhelminthes

FLAT WORM

Flat worm parasitism

gets food but harms host

Platyhelminthes habitat

As a free-living worm or parasitic

Flat worm organization

organ

flat worm symmetry

bilateral

flat worm cephalization

present

flat worm body cavity

absent

flat worm digestive

gastrovascular

flat worm circulatory

absent

flat worm respiratory

absent

flat worm reproduction

sexual and asexual, are also hermaphroditic

flat worm support

none

flat worm examples

tapeworm, flukes, turbellaria

flat worm species

12 thousand

cnidarian species

9 thousand

porifera species

5 thousand

Nematoda definition

round worms

What worms have segments?

Not Nematoda or Platyhelminthes, but Annelida

Nematoda organization

organ system

Nematoda symmetry

bilateral

Nematoda cephalization

present

Nematoda body cavity

absent

Nematoda digestive

complete (pseudocoelom)

Nematoda circulatory

absent

Nematoda respiratory

absent

Nematoda reproduction

sexual and asexual

Nematoda support

hydrostatic skeleton

Nematoda examples

ascaris, threadworm, lungworm

Annelida definition

little ring. The segmented worm

Setae

bristle/hair-like structures that prevent the worms from slipping backwards. Only in Annelida

Three classes of Annelids

Polychaeta - sandworms

Oligochaeta - earth worms

Hirudinea - leeches

Annelida organization

organ system

Annelida symmetry

bilateral

Annelida cephalization

present

Annelida body cavity

complete

Annelida digestive

complete

Annelida circulatory

present

Annelida respiratory

absent

Annelida reproduction

sexual and asexual

Annelida support

hydrostatic skeleton

Annelida examples

sandworms, earthworms, leeches

Annelida species

12 thousand

2 characteristics of Arthropoda

chitin exoskeleton

jointed appendages

4 classes of Arthropods

Chelicerates

Myriapods

Crustaceans

Hexapods

Chelicerates

Arachnids. Have a cephalothorax. 6 sets of appendages (2 at the head). Have an abdomen. Spiders.

Myriapods

Segmented little creatures with pairs of legs. Centipedes have 1 pair per segment, millipedes have 2 per segment.

Crustaceans

brine shrimp, crab, lobster.

Hexapods

Insects. Bees, ants, silverfish

Arthropoda organization

organ system

Arthropoda cephalization

present

Arthropoda body cavity

present

Arthropoda digestive

present

Arthropoda circulatory

present

Arthropoda respiratory

present

Arthropoda reproduction

sexual and asexual

Arthropoda support

chitin exoskeleton

Arthropoda examples

millipedes, shrimp, bees, spiders

Arthropoda species

1 million

Mollusca

the foot creatures

Musculat

a foot organ that helps the creature move, burrow, and capture prey.

Mantle

fleshy soft layer of tissue that secretes a shell and encloses internal organs. found in Mollusca

4 classes of Mollusca

Gastropoda

Cephalopoda

Bivalvia

Polyplacophora

Gastropoda

slugs and snails

Bivalvia

2 valves. scallops, oysters

Polyplacophora

chiton

Cephalopoda

octopus, squid, ammonites

Mollusca organization

organ system

Mollusca cephalization

present