Roundworm

Mason Diffenderfer

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.

Symmetry

Bilateral

Cephalization

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


Body Cavity

Pseudocoelom

Segmentation

No

Digestive System

Complete Digestive system.


Circulatory System

None

Respiratory System

None

Excretory System

It has lateral lines running through its body.

Nervous System

They have Dorsal and Ventral Nerve Cords.


Reproduction

They have sexual reproduction.

Support

They have a hydrostatic skeleton.