Characteristics of Phylum: Platyhelminthes Mostly parasitic Organ level organization (no specialized circulatory or respiratory structures) Have undergone cephalization (have head) Ladder-type nervous system (no spinal cord) Bilateral symmetry (rt. & lt. side)

What is this? What is the class, genus and common name? Scolex – Cestodes – Taenia - tapeworm What is the class and the common name? Turbellaria - planarian Identify what this is. tapeworm↓ What is the class, genus and common name? Trematodes – Fasciola - fluke

Characteristics of Phylum: Annelidae Segmented Marine Use body pressure to give body form Have setae (bristles) for movement

What is the class and common name? Polychaete - clamworm What is the class and common name? Oligochaete - earthworm Identify this. earthworm↓ Identify this. earthworm↓

Characteristics of Hirudinea: Fresh water Two suckers No setae Prevent clotting by means of hirudin, a powerful anticoagulant What is the class and common name? Hirudina - leech

Label this part of the earthworm

Answers 13. Intestines 16. Nephridium – bladder & excretory tubules 36. Setae

LABEL

Answers 6. Mouth 8. Pharynx 9. Esophagus 10. Calciferous glands 11. Crop 12. Gizzard 13. Intestines 16. Nephridium – bladder & excretory tubules 23. Hearts 25. Brain 30. Seminal vesicles – sperm sacs 32. Ovary 34. Clitellum 36. Setae 37. Septa

LABEL

Characteristics of Phylum: Nematoda Roundworms Complete digestive tract Tell males from females Have cloacae (common opening) Males have spicules

What class does this belong? Trichinella What disease does this worm cause? Trichinosis What class does this belong? Ascaris→ Where is this worm found? Intestinal tract→

Characteristics of Phylum: Mollusca Three part body Visceral = contains internal organs Mantle = may secrete shell and/or contribute to the development of gills or lungs Foot = muscle for locomotion, attachment, or food capture

What class does this belong and what is the common name? Cephalopoda - squid What class does this belong and what is the common name?→ Cephalopoda - octopus

What class does this belong and what is the common name? Gastropoda – land snail What class does this belong and what is the common name?→ Gastropoda - slug

What is the class and common name? Bivalvia - clam What is the class and common name? Bivalvia - clam

What is the class and common name? Bivalvia - scallop What is the class and common name? Bivalvia - scallop

What is the class and common name? Bivalvia - mussel

LABEL

ANSWERS 1. SHELL 6. MUSCLE 8. MANTLE 9. FOOT 18. KIDNEY 21. GILLS 22. VENTRAL (INCURRENT) SIPHON 23. DORSAL (EXCURRENT) SIPHON 28. HEART

LABEL

ANSWERS 5. Muscle 6. Muscle 8. Mantle 9. Foot 10. Mouth 11. Labial palps 12. Esophagus 13. Stomach 14. Digestive gland 15. Intestine 18. Kidney 21. Gills 28. Heart 40. gonad

A A B E D IDENTIFY THESE C

ANSWERS A. Clam B. Scallop C. D. E. Snail

Phylum:Platyhelminthes Classes Turbellaria (planarians) Trematodes (flukes/Fasciola) Cestodes (tapeworms/Taenia)

Planarians (flatworms) Fresh water No anal Pharynx on belly Flame cells function as kidneys Have testes and ovaries Three muscle layers which allow movement in all directions Outer Inner diagonal Head is bluntly arrow shaped Two light sensitive eye spots Auricles function as sense organs

Flukes (flatworms) Parasitic Well developed nerves and gastro cavity are NOT necessary All parasites will have at least two hosts

Tapeworms (flatworms) No mouth Lay in digestive tract and live off juices Have head (scolex) and rest are segments that will have eggs and exit in feces

Phylum:Nematoda Classes Trichinella (roundworms) Ascaris (roundworms)

Phylum:Annelidae Classes: Polychaete (clamworms) Oligochaetes (earthworms) Hirudinea (leeches)

Clamworms Have jaw Parapodia (gills and paddles)

Earthworm Have five hearts Crop Clitellum (attach to reproduce) Gizzard breaks down food Central nervous system Have ovaries and testes

Leeches Fresh water Two suckers No setae Prevent clotting

Phylum:Mollusca Classes: Bivalvia (clams, scallops, mussels, oysters) Gastropoda (snails, slugs) Cephalopoda (octopus, squid)

Clams, Scallops, Mussels, Oysters Gills gather oxygen and filter feeds Tongue cleans gills and organs for food Small ganglion (brain) Same organs we have Liver = digestive gland Adductor muscles hold shell together Sexes are separate

Snails, Slugs Crawl on stomach and secrete slime Coiled shell Tentacles w/ eye stalks Gills are in mantle Mantle functions as lungs Organ system like Bivalves Radula (tongue) = rough

Octopus, Squid Head footed Tentacles and arms capture prey by using suckers Well developed sense organs Octopus = slow Squid = fast They are predators