Plathy, Annelids Flashcards
(13 cards)
What are the main groups of echinoderms?
Holothorians, Echinoids, Asteroideans
These are major classes within the phylum Echinodermata.
What type of symmetry do echinoderms exhibit?
Bilateral
Echinoderms have bilateral symmetry in their larval stage.
What is the purpose of the gastrovascular cavity?
Digestion and circulation
It serves as both a digestive cavity and a circulatory system.
What are the components of the nervous system in echinoderms?
Nerve ring and radial nerves
The nervous system is decentralized and lacks a brain.
What are the feeding types of life processes in echinoderms?
Carnivores, detritivores, filter feeders
Echinoderms have diverse feeding strategies.
What are the reproductive characteristics of echinoderms?
Oviparous, hermaphrodites
Many echinoderms can produce both eggs and sperm.
What are the main classes of flatworms?
Turbellaria, Trematoda, Monogenea, Cestoda
These classes include free-living and parasitic forms.
What type of body structure do annelids possess?
Segmented body
Annelids have a body divided into segments.
What are the three major classes of annelids?
Polychaeta, Oligochaeta, Hirudinea
Each class has distinct characteristics and habitats.
What is the method of gas exchange in echinoderms?
Gas diffusion through gills
Gills facilitate gas exchange in aquatic environments.
What is the primary method of reproduction in many echinoderms?
Budding
Some echinoderms can reproduce asexually through budding.
Fill in the blank: Echinoderms have a _____ nervous system.
decentralized
This means they do not have a central brain.
True or False: All flatworms are free-living.
False
Many flatworms, such as Trematoda and Cestoda, are parasitic.
