ZOO 115 Invertebrate Zoology

Slides:

Advertisements

Similar presentations

By: John Lee, Jon Fuller, and Vicky Hung

Advertisements

Chapter 12 Part 2 The Worms Platyhelminthes, Nematoda & Annelida.

Journal #1 What is one thing you know about roundworms? What is one thing you want to learn about roundworms?

AKA Unsegmented roundworms.

Pseudocoelomates : Round Worms Chapter 11. Round Worms 2 Main Phlya – Nematoda “thread worm” ex: hookworms, pin worms, ascaris, filarial worms – Rotifera.

Platyhelminthes General characteristics:

Invertebrates 2 Ctenophora, Platyhelminthes, Nematoda.

Pseudocoelomate Animals, Chapter 9, Zoology

Lecture 12: Phylum Nematoda (Nemata) The Nematodes

P H Y L U M N E M A T O DA ISABELLA DAO THONG NGUYEN PERIOD 6.

Phylum Nematoda Highest abundance of any animal on planet:  4 million / square meter in marine  ~ 16,000 species described  > 100,000 predicted taxa.

The Acoelomates (continued)

Unsegmented Worms. Flatworms Belong to the phylum platyhelminthes. (Plat = flat) There are three classes: –Turbellaria –Trematoda –Cestoda.

Earthworm Lab Preview April 16,  General Terms for an Animal’s Structure:  Dorsal – top side  Ventral – bottom side  Anterior – front of the.

Chapter 23 Invertebrate Diversity

Worms Flatworms Bilateral symmetry No coelum Has organs & systems 3 body layers –Ectoderm –Mesoderm –Endoderm Gasses pass in/out by diffusion Anterior.

Chapter 34 Section 2 Phylum Nematoda & Rotifera. Phylum Nematoda Roundworms (pseudocoelomates) Bilaterally symmetrical 1mm-120mm (4 feet) Digestive tract.

Flatworms/Roundworms Phylum Platyhelminthes Phylum Platyhelminthes platy-flat, helminth-worm platy-flat, helminth-worm three classes three classes 1. Class.

The WORMS Kingdom Animalia Various Phyla Platyhelminthes (Flatworms)

Flatworm Characteristics --Flat bodies (gases move by diffusion) --bilateral symmetry --gastrovascular cavity --some flatworms are parasitic, some are.

Phylum Nematoda & Rotifera

AKA Unsegmented roundworms.

Roundworms (Phylum Nematoda). Features Bilateral symmetry and 3 cell layers Plus a “pseudocoelom” (fluid filled space betwen the mesoderm and internal.

ROUNDWORMS Kingdom Animalia - Phylum Nematoda --Unsegmented worms --Pseudocoelom ("false coelom") -- body cavity contains organs.

I. Sponges A. Phylum Porifera a. asymmetric

NEMATODA. Characteristics  Roundworms  Name means “thread- like”  Thought to be most abundant animals on Earth (only about 20,000 species identified,

Platyhelminthes (Flatworms) General characteristics: – Body plan: acoelomate, bilateral symmetry Habitat: aquatic Nutrition: many are parasites, feed off.

How do the acoelomates fit in? Porifera unknown common ancestor Cnidaria triploblastic organ level of organization Platyhelminthes protonephridia cephalization.

Phylum Nematoda

Chapter 34/35 : Worms. I. Body Positions Dorsal (Back) Posterior (Rear) Anterior (Head) Ventral (Belly) *Bilateral symmetry – cut down middle and both.

Segmented Worms Earthworm

NEMATODA AKA: Round Worms. WHAT IS A ROUNDWORM? What Is a Roundworm? Most species of roundworms are free-living, inhabiting soil, salt flats, aquatic.

The Roundworms.  Triploblastic Pseudocoelomate  Three tissue layers  False Body Cavity No Mesentery (thin connective tissue) to support the organs)

THE NEMATHELMINTHES OR ROUNDWORMS

Pseudocoelomates Aschelminths.

The Aschelminthes Phylum Nematoda. General Information The term “Aschelminthes” refers to a large group of about ten different phyla of soft- bodied worms.

Phylum Nematoda The Roundworms.

Kingdom Animalia Lower Invertebrates. Characteristics: eukaryotic multicellular heterotrophic consumers no cell walls sexual and asexual reproduction.

Unsegmented Worms.

Roundworms!. Phylum Nematoda (roundworms) The Facts … Body symmetry- Bilateral Reproduction- Sexual Movement- thrashing from side to side Food- Parasites.

Bilaterally Symmetrical Worms Platyhelminthes, Nemertea, Nematoda, Annelida, and 4 unique groups.

Kingdom Animalia Lower Invertebrates. Characteristics: eukaryotic multicellular heterotrophic consumers no cell walls sexual and asexual reproduction.

Phylum Nematoda.

3 Worm Phyla (long, thin bodied animals) All eumatazoans (have true tissues) All have bilateral symmetry Develop a coelom → body cavity 1. Phylum Platyhelminthes.

3 Worm Phyla (long, thin bodied animals) All eumatazoans (have true tissues) All have bilateral symmetry Develop a coelom → body cavity 1. Phylum Platyhelminthes.

Roundworms Ch Phylum – NEMATODA Among the most numerous animals.

By: Cassidy Rohlfing, Paige Oblack, Erin Long

Free-Living Roundworms

Ecdysozoa-Molting Animals Ecdysis- “an escape” -molting of exoskeleton or cuticle Phyla- Nematoda and Arthropoda.

Phylum Nematoda Roundworms.

Flatworms Phylum: Platyhelminthes. Flatworms Phylum: Platyhelminthes.

Introduction to Nematoda (Roundworms)

Phylum Nematoda p. 575.

KINGDOM ANIMALIA Phylum Nematoda

The Invertebrates The Worms.

Lecture 15: Kingdom: Animalia

Clade Ecdysozoa-Molting Animals Ecdysis- “an escape” -molting of exoskeleton or cuticle Phyla- Nematoda and Arthropoda.

WORM VOCAB ONLY.

KINGDOM ANIMALIA Phylum Nematoda

Unit 3B Journal #1 9/19 Put a clean sheet of paper in your folder. Use the following SAT words based on what you’ve learned this school year. Must be.

Phylum Nematoda Roundworms.

Roundworms Phylum Nematoda.

Abby Griffin feat. Jacob Ulery

Phylum Nematoda Roundworms.

Clade Ecdysozoa-Molting Animals Ecdysis- “an escape” -molting of exoskeleton or cuticle Phyla- Nematoda and Arthropoda.

Unsegmented worms.

Presentation transcript:

ZOO 115 Invertebrate Zoology Nematoda

Phylum Nematoda Common name: round worms >20,000 species. Mostly widespread and abundant of all metazoans 90,000 worms in a decomposing apple. Marine and freshwater benthos, soil, parasites on plants and animals hooge.developmentalbiology.com/meiofauna/media

Phylum Nematoda - Anatomy /creatures.ifas.ufl.edu/nematode Nerve cords Ovaries Excretory canal Digestive tract Most freeliving <2.5 mm in length. Some parasites > 50 cm in length. Body is cylindrical with a pseudocoel Complex cuticle Must molt (Ecdysis) Anterior end is radially symmetrical but the rest of the body has bilateral symmetry

Phylum Nematoda - Head Region Nervous system www.unice.fr/LEML/coursJDV/images/biologie/ Sensilla /creatures.ifas.ufl.edu/nematode Sensilla Chemosensory Males also have them near the anus Brain Ring-like brain /creatures.ifas.ufl.edu/nematode www.unice.fr/LEML/coursJDV/images/biologie/ Dorsal, ventral and lateral nerve cords

Phylum Nematoda - Head Region /creatures.ifas.ufl.edu/nematode 3 to 6 lips 3-6 lips at the mouth Muscular pharynx Pharynx /creatures.ifas.ufl.edu/nematode Buccal Cavity varies depending on prey Bacteria - no teeth or stylet Plant root - stylet Carnivore - small teeth and sometimes stylet Intestine - large hook-like teeth Stylet - like a Hypodermic needle Buccal Cavity

Phylum Nematoda - Digestive tract Hindgut - Rectum Rectum Anus Foregut (buccal cavity and pharynx shown earlier) /creatures.ifas.ufl.edu/nematode /creatures.ifas.ufl.edu/nematode /creatures.ifas.ufl.edu/nematode Midgut -Intestine Intestine Cuticle

Phylum Nematoda – Excretion Nerve cords Ovaries Excretory canal Digestive tract www.ustboniface.mb.ca/cusb/abernier/Animaux/Pseudocoelom Longitudinal Muscles Excretory glands and canals thought to be involved in: Osmoregulation Ionic regulation Excretion of waste metabolites Ammonia secreted through body wall

Phylum Nematoda – Musculature Nerve cords Ovaries Excretory canal Digestive tract www.ustboniface.mb.ca/cusb/abernier/Animaux/Pseudocoelom Longitudinal Muscles Longitudinal muscles only!

Phylum Nematoda - Reproduction creatures.ifas.ufl.edu/nematode/ Separate sexes - usually Males have hook-like posterior Testis Male Rectum - Cloaca Reproduction Digestive waste Spicule for sperm transfer Retractable Spicule www.apsnet.org/education/LessonsPlantPath/PineWilt/images/ Testis Rectum - Cloaca

Phylum Nematoda - Reproduction creatures.ifas.ufl.edu/nematode/ creatures.ifas.ufl.edu/nematode/ Females Ovaries Eggs Vulva Seminal Receptacle Ovary Seminal recepticle Vulva Eggs

Phylum Nematoda - Parasites: Roundworm Life Cycles Racoon parasite Baylisacaris procyonis www.extension.umn.edu/distribution/cropsystems/images Plant parasite Human Parasite Ascaris lumbricoides

Phylum Nematoda - Parasites: Hookworm www.biosci.ohio-state.edu/~parasite/lifecycles

Phylum Nematoda - Parasites: Trichinella

Phylum Nematoda - Parasites: Filariasis www.cvm.okstate.edu/~users/jcfox/htdocs/DISK1/IMAGES/