Nematode Lesson

Nematode Lesson

The Phylum Nematoda contains a number of round worms having a tubular digestive system and very diverse living conditions.

Bilateral symmetry

Round body design

Three tissue layers

Ectoderm

Mesoderm

Endoderm

Tube like digestive system - if any

Ladder nervous system

Some with sense organs

Free-living in water or on land or parasitic.

Examples: Ascaris, Hookworm, Trichina

Round Worm

Segmented Worm

Note the teeth-like plates that are used to attach this hookworm to the surface of the intestinal tract. Hookworms can each drink 1.0 ml of blood per day.

Research Links:

Haliclona Finger sponges

Miscellaneous Invertebrate Zoology Links

Protozoa and simple animals

A study of animal structure ....

Nonindigenous Coelenterates

CalPhotos: Photos of California Animals

Yucky Worm World

flatworm

Phylum Platyhelminthes

BIODIDAC Samples

USDA Nematology Lab

University Of Nebraska Nematology

Learning Links Flatworms and Roundworms

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The Phylum Nematoda contains a number of round worms having a tubular digestive system and very diverse living conditions.
Bilateral symmetry Round body design Three tissue layers Ectoderm Mesoderm Endoderm Tube like digestive system - if any Ladder nervous system Some with sense organs Free-living in water or on land or parasitic. Examples: Ascaris, Hookworm, Trichina
Round Worm	Segmented Worm

Note the teeth-like plates that are used to attach this hookworm to the surface of the intestinal tract. Hookworms can each drink 1.0 ml of blood per day.