Question

some characteristics of annelida

Answer 1

have tube within tube body shape organisation
have complete digesition system
organ system organisation
closed blood circulation except leech hirudunia
protosomes means mouth develops first
non cordates
segmented body
ex paritima

Answer 2

$\huge\textbf{ANNELIDA}$

$\textbf{Characteristics}$

→ These are aquatic and terrestrial animals.

→ They have organ level of organization system.

→ Sense organs like eyes, antenna, nose etc. are present in them.

→ They are Bilaterally symmetry and Triploblastic animals.

a) $\underline{Bilateral Symmetry :}$The body can be divided into two equal halves by a single plane.

b) $\underline{Triploblastic :}$ In which three layers namely endoderm, ectoderm and mesoderm are present.

→ Digestive system is complete in them.

→ They respire through their skin.

→ Closed circulatory system is present in them.

→ They reproduce sexually.

→ It divide into segments by rings.

→ Parapodia is present in them, which helps in movement.

→ Ex :- Earthworm, Leeches etc.
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