Roundworm

Level of organization

Phylum nematoda have a system level of organization. They are roundworms with bodies that are not divided into separate segments.


Germ Layers

Roundworms are triploblastic, which means their embryos have all three germ layers.


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Symmetry

Bilateral


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Cephalization

Does have cephalization. Most sensory organs and nerve cells located at anterior end. This is known as cephalization


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Body cavity

Pseudocoelom


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Segmentation

No


Digestive system

Complete Digestive system.


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Circulatory System

None


Respiratory System

None


Excretory System

Lateral Lines


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Nervous System

Dorsal and Ventral Nerve Cords


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Reproduction

Sexual Reproduction


Support

Hydrostatic skeleton


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