Round Worms

BY: DYLAN JORDAN

Big image

Germ Layers

A round worm has three germ layers.

http://waynesword.palomar.edu/trnov01.htm

Big image
Big image

Body Cavity

Big image

Level of Organization

Bilateral symmetry, organ-level of organization, true coelom or pseudocoel

http://www.mhhe.com/biosci/genbio/maderbiology7/student/olc/chap33-outline.mhtml

Big image

Digestive System

A roundworm has a definite digestive system that runs the length of their bodies. It has a mouth, pharynx, intestine and anus. Many are parasites and live off other animals and plants. yurtbiostudents.wikispaces.com

Big image

Nervous System

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

http://www.ucmp.berkeley.edu/phyla/ecdysozoa/nematoda.html

Big image

Circulatory System

A roundworm has no heart or formal blood vessels.

http://www.mcwdn.org/Animals/Roundworms.html

Big image

Respiratory System

A roundworm has no formal respiratory system.

https://www.koofers.com/flashcards/bi-exam-1-1/review

Big image

Excretory System

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

http://sites.google.com/site/roundworms69/structure

Big image

Reproduction

A roundworm reproduces sexually. The female has an ovary, holds eggs in an oviduct and then passes them to the uterus, where they are fertilized. The male has sperm cells are made in the testis and stored in the vas deferens. When it is time to reproduce, the sperm cells pass through the spicule. Over 200,000 eggs can be deposited at once in the soil once they are fertilized. http://health.kernan.org/imagepages/1005.htm

Big image
Big image