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Phylum Annelida
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Answer:
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Explanation:
Concept: Animal Kingdom
PHYLUM ANNELIDA
The body surface of Annnelids is distinctly marked out into segments or metamere and, hence, the phylum name Annelida.
They exhibit organ-system level of body organization, bilateral symmetry,they are triploblastic, metamerically segmented and coelomate animals.
Aquatic annelids possess lateral appendages called asparapodia. For example- Nereis
Nephridia help in osmoregulation and excretion.
Neural system consists of paired ganglia connected by lateral nerves to a double ventral nerve cord.
Reproduction is sexual.
Nereis, an aquatic form, is dioecious, but earthworms and leeches are monoecious.
Examples - Nereis, Pheretima (Earthworm)
Know more:-
Osmoregulation:
Osmoregulation is a process that regulates the osmotic pressure of fluids and electrolytic balance in organisms.
Dioecious:
Phylum having the male and female reproductive organs in separate individuals.
Monoecious:
Phylum having both the male and female reproductive organs in the same individual; hermaphrodite.
Explanation:
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