Zoology – Phylum Arthropoda andNematodaReview-NAME______

Define:

pseudocoelom- FALSE CAVITY NOT COMPLETELY LINED W/MESODERM Arthro- JOINTED chitin- PROTEIN THAT MAKES UP EXOSKELETON diptera- TWO WINGS, ORDER OF FLIES

cuticle OUTER COVERING OF ROUNDWORMSPoda FOOT OR APPENDAGE carapace DORSAL SHIELDOF ANIMAK coleopteran ORDER OF BEETLES

chelicerae FANGSecdysisMOLTING OF CUTICLE OR EXOSKELETONOptera, ptera- WING mandible JAWS

Phylum Nematoda-

1. What type of organisms belong to phylum Nematoda?__ROUNDWORMS_____ Which body plan do they have?__PSEUDOCOELOMATE__ Describe this plan. FLUID FILLED CAVITY NOT COMPLETELY LINED W/ MESODERM

2. What do these organisms have on the outer part of their body? CUTICLE

3. Ascaris,the genus dissected, contains mostly structures of a specific system. Which system is this? REPRODUCTIVE- PARASITES

4. Are roundworms usually hermaphrodites, or do they have separate sexes. Identify the male and female cross sections and label parts. SEPARATE SEXES

MALEFEMALE

A= SEMINAL VESICLE

B= TESTES

C= INTESTINE (ENDODERM)

D= OVARIES

E= UTERUS

F= OVIDUCT

G= CUTICLE (ECTODERM)

Phylum Arthropoda- “JOINTED APPENDAGES”

1. Are arthropods the most diverse group of animals? YES

2. How do scientists classify organisms? TAXONOMY- ASSIGN A UNIVERSAL SCI. NAME, PLACE IN TAXA

What type of evidence do they use to place organism in categories? DNA, INTERNAL ANATOMY, EARLY DEVELOPMENT, FOSSIL RECORD, PHYSICAL CHARACTERISTICS

3. What are the two most distinguishing characteristics of Arthropods? JOINTED APPENDAGES, SEGMENTED BODIES

4. What is an arthropod’s exoskeleton made of? CHITIN

5. What type of symmetry do arthropods have? BILATERAL

6. Do arthropods have segmentation? YES

7. Arthropods have a metameric body plan. What does this mean? ONE SEGMENT AFTER ANOTHER, EACH SEGMENT HAS MULTIPLE BODY SYSTEMS

8. The fusion of segments to form body regions is called _TAGMATATION______.

Class INSECTA___ has three distinct body segments

Class _ARACHNIDA__ has members likes mites and ticks that have full fusion of segments( FULL TAGMATATION_____).

Most other arthropods have two body regions- the CEPHALOTHORAX______and _ABDOMEN______

9. Do arthropods have an open or closed circulatory system? OPEN- SPIRACLES, BOOK LUNGS

10. What is ecdysis and what happens during this process? “AN ESCAPE”- MOLTING OF EXOSKELETON OR CUTICLE FOR GROWTH

11.Which class of animals has members that are considered to be living fossils? Name and describe these organisms? MEROSTOMATA- HORSESHOE CRABS- CEPHALOTHORAX/CARAPACE, ABDOMEN W/ TELSON, 250 MY

What do humans use these organisms for? TEST MEDICAL SUPPLIES AND MEDICINE FOR ENDOTOXINS OR PATHOGENS

12. What are the three subphyla ofArthropoda and their corresponding classes?

Subphylum _TRILOBITOMORPHA_____ characteristics-

Class _TRILOBITA___ex. TRILOBITES

Important facts- SUCCESSFUL FOR 300 MY, EXTINCT

Subphylum__CHELICERATA__char. FANGS, NO ANTENNAE OR MANDIBLES, 4 PAIRS WALKING LEGS

Class_MEROSTOMATA___ ex. HORSESHOE CRABS

Important facts- LIVING FOSSILS, 250 MY

Class_ARACHNIDA____ ex. SPIDERS, SCORPIONS, TICKS, MITES

Facts- 4 WALKING LEGS, PEDIPALPS

Subphylum _MANDIBULATA_____char.- JAWS, 2 PAIRS OF ANTENNAE, COMPOUND EYES

ClasS_MYRIAPODA_____ex. CENTIPEDES AND MILLIPEDES

Important facts-How do these two types of organisms differ? CENTIPEDES- COLORFUL AND CARNIVOROUS, MILLIPEDES- PLAIN AND HERBIVOROUS

Class__INSECTA__ ex. “BUGS”, LADYBUGS, BEES, GRASSHOPPERS, CRICKETS, ANTS, BEETLES

Facts- 3 BODY REGIONS, USUALLY SIX LEGS

Draw a diagram of the incomplete and complete metamorphosis life cycle-

IncompleteComplete

Eggnymph ADULTEGG LARVAPUPAADULT

Class_CRUSTACEA______ex. LOBSTERS, CRABS, CRAYFISH, SHRIMP, COPEPODS

Facts- BIRAMOUS APPENDAGES, NAUPLIAR LARVAE

STUDY ARTHROPOD Color Codes- pictures of organisms and Crayfish appendages!!!!!!!