Platyhelminces Flashcards
(15 cards)
What type of symmetry do Platyhelminthes exhibit?
Bilateral symmetry.
What covers the body of Platyhelminthes?
Nerve cords and nerves.
What is the function of the gastrovascular cavity in Platyhelminthes?
It is where digestion occurs.
What openings are present in Platyhelminthes?
Mouth and anus.
What is present in some species of Platyhelminthes?
Head and simple eyes.
What are nervous ganglia?
A group of neurons that act as a ‘brain’.
How do Platyhelminthes exchange gases?
Gases diffuse through their smooth and uncovered skin.
What type of respiratory system do Platyhelminthes have?
They lack a respiratory system.
What is the nervous system structure in Platyhelminthes?
Nervous ganglia and nerve cords.
What is Platihelminthes?
Platihelminthes, commonly known as flatworms, are a phylum of invertebrates that include free-living and parasitic species.
What are the main classes of Platihelminthes?
The main classes are Turbellaria, Monogenea, Trematoda, and Cestoda.
What characterizes Turbellaria?
Turbellaria, specifically Planaria, are small free-living flatworms that show bright colors and are usually found in marine environments.
What is Monogenea?
Monogenea are very small external parasitic organisms usually found on the skin, gills, or fins of freshwater fish.
What are Trematoda?
Trematoda are small parasitic worms that infect most vertebrates, including humans.
What is Cestoda?
Cestoda are long internal parasites, with the best-known example being the tenia, a human intestinal parasite.
