Annelida Flashcards
What is the Phylum Annelida?
Annelida includes aquatic (marine and freshwater) or terrestrial (free-living and sometimes parasitic) organisms.
What level of body organization do Annelids exhibit?
They exhibit organ-system level of body organization and bilateral symmetry.
What type of symmetry do Annelids have?
Annelids have bilateral symmetry.
What is the body structure of Annelids?
They are triploblastic, metamerically segmented, and coelomate animals.
What does the name ‘Annelida’ mean?
The name Annelida comes from the Latin word ‘annulus’, meaning little ring.
What muscles do Annelids possess?
They possess longitudinal and circular muscles which help in locomotion.
What are parapodia and which Annelids possess them?
Aquatic annelids like Nereis possess lateral appendages called parapodia, which help in swimming.
What type of circulatory system do Annelids have?
Annelids have a closed circulatory system.
What is the function of nephridia in Annelids?
Nephridia help in osmoregulation and excretion.
What does the neural system of Annelids consist of?
The neural system consists of paired ganglia connected by lateral nerves to a double ventral nerve cord.
What is the reproductive strategy of Nereis?
Nereis, an aquatic form, is dioecious.
What is the reproductive strategy of earthworms and leeches?
Earthworms and leeches are monoecious.
How do Annelids reproduce?
Reproduction in Annelids is sexual.
Pheretima
Earthworm
Annelida
Hirudinaria
Blood sucking leech
Annelida
