Characteristics of Phylum: Platyhelminthes Mostly parasitic Organ level organization (no specialized circulatory or respiratory structures) Have undergone.

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 the class and the common name?Turbellaria - planarian

What is this? What is the class, genus and common name?Scolex – Cestodes – Taenia - tapeworm

What is the class, genus and common name?Trematodes – Fasciola - fluke

Identify what this is.tapeworm↓

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↓

What is the class and common name?Hirudina - leech

Characteristics of Hirudinea:-Fresh water-Two suckers-No setae-Prevent clotting by means of hirudin, a powerful anticoagulant

Label this part of the earthworm

Answers13. Intestines16. Nephridium – bladder & excretory tubules36. Setae

LABEL

Answers6. Mouth8. Pharynx9. Esophagus10. Calciferous glands11. Crop12. Gizzard13. Intestines16. Nephridium – bladder & excretory tubules23. Hearts25. Brain30. Seminal vesicles – sperm sacs32. Ovary34. Clitellum36. Setae37. 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 class does this belong?Ascaris→

What disease does this worm cause?Trichinosis

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

ANSWERS5. Muscle6. Muscle8. Mantle9. Foot10. Mouth11. Labial palps12. Esophagus13. Stomach14. Digestive gland15. Intestine18. Kidney21. Gills28. Heart40. gonad

IDENTIFY THESE

A A

B

C

D

E

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