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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