-nematosysts inject venom (jellyfish)

-carnivores, incomplete digestive systems

-not protostomes or deuterostomes

-external fertilization

-Symbiotic dinoflagellates provide food for corals

-external skeletons of calcium carbonate

-bilaterally symmetrical

-triploblastic

-invertebrate animals

-platyhelminthese, rotifera, mollusca and annelida

-flatworms

-parasites

-acoelomates

-incomplete digestive system or none at all

-asexual, fragments regenerate

-tapeworms

-parasites

-lack a digestive system

-small but complex and multicellular

-pseudocoelomates

-complete digestive system

-parthenogenesis:

1. asexual

2. mitosis

-external shell of calcium carbonate

-coelomates with digestive system and ventral nerve cord

-have a mantle that covers visceral mass

-open or closed circulatory system

1. gastropoda

2. bivalvia

3. cephalapoda

-lineage of mollusca

-feeds using radula

-open circulatory system

-muscular front foot for moving and digging

-larva stage called glochidia

-lineage of mollusca

-lineage of mollusca

-most lack external shell or they have internal shell

-closed circulatory system

-coelomates with digestive system

-closed circulatory system

-specialized feature for gas exchange

-ventral nerve cord

-hydrostatic skeleton

-leeches

-ectoparasites

-produce anti-coagulant

-earthworm

-skin/nervous system from ectoderm

-muscles/organs from mesoderm

-coelom lined with mesoderm

-metanephridia remove nitrogenous waste

-tube worms

-adults lack digestive track

-bacteria at base of thermal vents

-exoskeleton made of collagen

-movemnet is thrashing

-pseudocoelomates

-complete digestive system

-have excretory/nervous/cephalization

-lack circulatory/respiratory

-insects

-segmented bodies

-chitin exoskeletons

-jointed appendages

-respiration:

1.gills

2.book lungs

3.tracheal system

-lineage in arthropoda

-two body regions

-no mandible

-have fangs

-simple eyes

-6 pairs of appendages

-4 pairs of walking legs

-one pair chelicerae

-one pair pedipalps

-have mandible

-anntenae

-compound eyes

-3 pairs legs

-wings

-3 tagmata:

1.head

2.thorax

3.abs

-crabs, shrimp, barnacles

-anntenae (2 pairs)

-3+ pairs of legs

-compound eyes

-gills

-sexually reproduce w/ diploid most prominent

-gametes during meiosis

-cleavage, blastuala, gastrula, gastrulation

-multicellular, chemoorganoheterotrophic

-obtain nutrients through indegestion

-lack cell walls

-coelomates: lined with mesoderm

-pseudoceolomates: partially lined with mesoderm

-acoelomates: not lined at all

-asymmetrical

-lack nerves and muscles

-no true tissues or organs

-no gastrulation or germ layers

-2 layers: gelatinous and epithelial

-suspension feeders

-digestion is intracellular

-reproduction: serial hermaphrodites or asexually

-flagellated larvae

-jellyfish, coral

-diploblastic

-body forms: polyp or medusa

-shed exoskelton

- crayfish and parasites

endoderm

ectoderm
mesoderm

proto: mouth first

deutero: anus first