1. 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)

2. 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

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

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

5. 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

6. Label this part of the earthworm

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

8. LABEL

9. 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

10. LABEL

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

12. 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→

13. 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

14. 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

15. 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

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

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

18. What is the class and common name?
Bivalvia - mussel

19. LABEL

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

21. LABEL

22. 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

23. A A B E D
IDENTIFY THESE C

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

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

26. 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

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

28. 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

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

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

31. Clamworms
Have jaw
Parapodia (gills and paddles)

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

33. Leeches
Fresh water
Two suckers
No setae
Prevent clotting

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

35. 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

36. 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

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