Cnidarians Flashcards
(11 cards)
What is the anatomy of Cnidarians?
Cnidarians have a single opening that serves as both mouth and anus. They are marine animals with a sac-like body that shows radial symmetry.
What is radial symmetry in Cnidarians?
Radial symmetry means their body is arranged around a central axis.
How do Cnidarians capture prey?
Tentacles are mobile and trap prey, carrying them to the mouth.
What are cnidocytes?
Cnidocytes are specialized cells that cover the body of Cnidarians and contain harpoon-like poison organelles that help in capturing prey.
What is the function of the gastrovascular cavity in Cnidarians?
The gastrovascular cavity serves as both the digestive and circulatory system.
What is gas diffusion?
Gas diffusion is the process by which gases move from areas of higher concentration to areas of lower concentration.
What type of nutrition do cnidarians have?
Carnivores
What kind of nervous system do cnidarians possess?
A simple nervous system formed by a net of nerves.
What is gas diffusion?
The process by which gases move from areas of higher concentration to areas of lower concentration.
What is gas diffusion?
Gas diffusion is the process by which some animals obtain oxygen and release CO2 through their skin.
How does gas diffusion occur?
The exchange of gases depends on the concentration. The gas will move from where it is more concentrated to where it is less concentrated.
