Phylum PlatyhelminthesClass ?

Dugesia (planaria, non-parasitic flatworm)Class ?

Liver flukeClass ?

Tapeworm

Phylum PlatyhelminthesClass Turbellaria

Dugesia (planaria, non-parasitic flatworm)Class Trematoda

Liver flukeClass Cestoda

Tapeworm

Phylum Platyhelminthes, Class Trematoda (Flukes)

Parasitic, GVC, protonephridia, monoecious

Liver Fluke (Trematoda)

Tapeworm (Cestoda)

Proglottids?Scolex?Have protonephridia!Have NO digestive tract/no GVC (just diffusion)Lots of Gonads in each proglottid

•How many germ layers?•Is there a coelom? If not, what is there instead?

•Respiratory system?•Circulatory System?•Excretory System?

•Are there special types of cells used?•What is their skeletal system?•Is there a nervous system?

•If so, is there any cephalization?•What type of reproduction do they use?•How does their digestive system work?

•Where is waste expelled?•What are the three classes?

•Which are free living or parasitic?•Locomotion?

Platyhelminthes

•How many germ layers? Three•Is there a coelem? If not, what is there instead? No, the mesodermal cells fills upthe space

•Respiratory sytem? Diffusion•Circulatory System? Distrubution of nutrients by the branches of the GVC and Diffusion•Excretory System? Protonephridia

•Are there special types of cells used? Flame cells make fluid current•What is their skeletal system? mesodermal derived cells of the parenchyma•Is there a nervous system? ventral nerve ladder

•If so, is there any cephalization? some eyespots that only detect light•What type of reproduction do they use? Asexual & sexual (donate sperm to each other)•How does their digestive system work? Pharynx comes outside of mouth,"sucks" in the nutrients. Food is then pulled into the GVC and diffused out into cells; branching of the GVC distributes food everywhere (vascular function)

•Where is waste expelled? Mouth•What are the three classes? Turbellaria, Trematoda, Cestoda

•Which are free living or parasitic? Turbellaria is the only free living•Locomotion? Cilia and muscular contractions

Can you draw the Platyhelminthes cladogram????

Platyhelminthes

Cestoda and Trematoda have modified skin for parasitic life

branching of the GVC indicated!

What phylum is this organism in?

Marine or Freshwater

Which is ventral and dorsal?

What phylum is this organism in?

Platyhelminthes

Marine or Freshwater

Freshwater

Which is ventral and dorsal?Ventral has cilia

Dorsal

Ventral

Annelida Diversity

HirudineaPolychaetaOligocheata

Tube of a fan worm

Leeches

Polychaeta Feather Duster

Polychaeta Nereis

Tubifex (freshwater)

Fan worm(also a tube worm

Nereis

Feather Dusters (tube worm)

serpulid worm

sabbellid worm

oligochaeta hirdinea

polychaetaAnnelida Diversity

TubifexOligochaeta

Feather duster

Nereis

Polychaeta

? ?

??

Phylum AnnelidaClass Polychaetes

Nereis (clam/sand worm)Bristle worm Fan worm

Sabellidae (feather duster)Serpulidae (tube worm)

Class OligochaetesLumbricus (earthworm)Tubifex (sludgeworm)

Class Hirudinealeech

Phylum AnnelidaClass Polychaetes

Nereis (clam/sand worm)Bristle worm Fan worm

Sabellidae (feather duster)Serpulidae (tube worm)

Class OligochaetesLumbricus (earthworm)Tubifex (sludgeworm)

Class Hirudinealeech

Nereis (sand worm or clam worm)Phylum Annelida, Class Polychaetes

Nereis (Sandworm)

Phylum Annelida, Class Polychaetes

Bristle wormPhylum Annelida, Class Polychaetes

Nereis, Sandworm

Phylum Annelida, Class Polychaetes

Serpulidae (Tube Worm)Phylum Annelida, Class Polychaetes

Serpulidae (Fan Worm = a tube worm)Phylum Annelida, Class Polychaetes

tube made out of proteins and CaCO3 Tube can be "closed" to live high in tidal zone

Sabellidae (Feather Duster)Phylum Annelida, Class Polychaetes

Tube made out of proteins and sand grains (somewhat flexible)

Earthworm c.s.

Lumbricus (earthworm)Phylum Annelida, Class Oligochaetes

Earthworm c.s.

•Respiratory System?•Any pigments?

•Circulatory System?•Any major organs/ vessels?

•What is its skeletal system?•How does it move?

•How many setae per segment?•Digestive System?

•What is structure is analogous to the microvilli in humans?•What structure is analogous to gastrolith in arthropods?•What is the intestinal peritoneum made of?

•What do chloragogen cells do?•What structure is that analogous to in rats?

•Does it have a nervous system?•Any major nerve cords?•If so, is there cephalization?

•How does it reproduce?•If sexual, mono or diecious?•What are the organs involved?

•How does it excrete waste?•What are the layers outside of the coelom in an annelid?

•Respiratory System? Diffusion•Any pigments? Hemoglobin

•Circulatory System? Closed Circulatory•Any major organs/ vessels? Ring like pseudo hearts, dorsal blood vessel

•What is its skeletal system? Hydraulic / hydrostatic•How does it move? Muscular contractions (ring + circular) and anchoring with the setae

•How many setae per segment? Four setae per segment•Digestive System? Pharynx Esophagus Crop Gizzard Intestine Anus

•What is structure is analogous to the microvilli in humans? typhosole•What structure is analogous to gastrolith in arthropods? Calciferous glands•What is the intestinal peritoneum made of? Chloragogen cells

•What do chloragogen cells do? Synthesize and store glycogen, detoxification•What structure is that analogous to in rats? liver

•Does it have a nervous system? Yes•Any major nerve cords? Ventral nerve cord•If so, is there cephalization? Suprapharyngeal ganglion

•How does it reproduce? Sexual (some Annelida also asexuaxal)•If sexual, mono or diecious? Monoecious•What are the organs involved? Citellum offers mucus for sperm

•Three pairs of seminal vesicles that store mature sperm•Two pairs of seminal receptacles (or spermatheca) to receive sperm

•How does it excrete waste? nephrostome (in septum), Metanephridia, nephridiopore (exit)•What are the layers outside of the coelem in an annelid? Cuticle, thin epidermis, circularmuscles , longitudinal muscles, coelomic lining

lumen ofGI tract

lining of GI tract

dorsal blood vessel

Circular muscles

Longitudinal muscles

epidermis secretes cuticle

chloragogencells

=nephrostome

What do the seminal vesicles hold?

Testes and ovary ventral under GI tractsperm stored in seminal vesicles

anterior and posterior

in serum!

esophagusposterior ofpharynx

chloragogen cells/ tissue seen in yellow dorsal on the intestine(liver-like function!)