1. By: Tyler Scalzo, Cody Stewart, and Josh Rutkowski
Platyhelminthes
By: Tyler Scalzo, Cody Stewart, and Josh Rutkowski

2. Symmetry & locomotion Bilateral
Moves by contracting longitudinal transverse muscle
Can also move by cilia in a slime trail

3. Nervous and digestive system
Nervous System
Has a very simple nervous system
Two chords run down either side of the body
Two simple brains called ganglia
Cerebral ganglia are clusters of nerves
Has two eye spots to help sense light
Digestive System
Two way system
Absorbs nutrients
Food goes to gut like system
Exists waste through Pharynx

4. Excretory & Circulation System
Excretory System
Has flame cells
Function like a kidney
Removes waste materials
Circulatory System
Receives oxygen through diffusion

5. Respiratory System & Skeleton
Absorbs oxygen through skin
Skeleton
Has no skeleton present
Soft bodied organism

6. Reproduction Is both asexual & sexual
Sexual reproduction is preferable in most Platyhelminthes
Has both male and female organs
Reproduces by regeneration
Hermaphrodites
Parasitic Platyhelminthes lay their eggs on or inside their host

7. Class Turbellaria Have ciliated epidermis & sub epidermis
Rhabdites (rod like structures in cells of epidermis)
Ex: Planarian (non parasitic flatworm)

8. Class Trematoda All are relatively parasitic & feed on host
Ex: Flukes (have suckers that feed on host)

9. Class Cestoda Tape Worms
Specifically live in digestive tracts of animals
Have no gut
Parasite
Ex: Tape worm

10. Works Cited
“Cestoda.” Wikipedia, Wikimedia Foundation, 1 Oct. 2017, en.wikipedia.org/wiki/Cestoda.
The Editors of Encyclopædia Britannica. “Fluke.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., 31 Aug. 20
Campbell, Andrew. “Turbellaria.” Animal Diversity Web, animaldiversity.org/accounts/Turbellaria/.15,
Modern Biology. Holt, Rinehart and Winston, 2002

11. Other Facts
Platyhelminthes are referred as flatworms because they have a flat and round shape
Cephalization is the focusing of nerve tissue from one end to the other end of an organism to produce a head region with sensory organs
Platyhelminthes live in shallow water or the inside of a host
First, infected animals defecate. Then, the tapeworms that were in the feces create lava on the grass. The animals eat the grass, and the lava forms cysts into the muscle. When an animal is butchered, the worms are still in the cyst. If raw meat is eaten before it is cooked to kill the worm, the worm spreads in the consumer’s gut