Question

Difference between Nematodes and Echinodermata.​

Answer 1

Explanation:

Nematodes: These are parasitic creatures with unsegmented and cylindrical body.

Echidnodermata : It is a animal class of fishes. Example : starfish

Answer 2

NEMATODES

1. ‘nema’- thread. ‘Oda’ - like
2. Free living or parasitic.
3. They are bilaterally symmetrical
4. They are triploblastic.
5. No true cavity or coelom [ pseudocoelomates ]
6. There are tissues, no real organs
7. Body is elongated, narrow and cylindrical.
8. They are the first animals to have a complete or straight alimentary canal.
9. Females are longer than males.
10. Eg: ASCARIS ( round worms)
WUCHERERIA BANCROFTI ( filarial worms )



ECHINODERMATA :

1. Have spines on their skin
2. Free living
3. All are aquatic.
4. Has cavity ( coelom )
5. Radical symmetry in adults and bilaterally symmetry in larvae.
6. Hard exoskeleton made of calcium carbonate.
7. They are triploblastic.
8. Have a water circulatory type system used for moving abroad.
9. No head or tail on the front or the bottom sides but have ventral and dorsal surfaces
10. Eg: ASTARIAS ( star fish )
ANTEDON ( feather star )


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