Roundworms

Sam Drake

Level of Organization

They are in the Organ-level


Germ Layers

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


Symmetry

They have bilateral symmetry.


Cephalization

Yes, they have a head.


Body Cavity

Their body cavity is called a pseudocoelom.


Segmentation

Yes they have segmentation.


Digestive System

Yes they have a digestive system they have a mouth and an anus.


Circulatory System

A roundworm has no heart or formal blood vessel.


Respiratory System

A roundworm has no formal respiratory system.


Excretory System

A roundworm has an anus at its rear end and a series of excretory tubes that end in an excretory pore.


Nervous System

A roundworm has two nerve cords that transmit impulses in the roundworm.


Reproduction

A roundworm reproduces sexually.


Support

A roundworm has no skeleton.