Question

general characteristic of phylum nematoda​

Answer 1

$\huge{\underline{\tt{\green{Characteristics\:Of\:Nematoda-}}}}$

• In Greek nema means thread and helmins means worms.

• They are bilaterally symmetrical.

• These are triploblastic and pseudocoelomates.

• Nervous system is ladder like.

• Sexes are unisexual and always show sexual dimorphism.

• They are triploplasic

• Pseudo coelom is present.

• They are parasitic worms

• Body is unsegmented.

• Examples = Ascaris, Ancylostoma, Wuchereria.

Answer 2

$\huge\bf\underline\mathfrak{Answer :}$

Characteristics of phylum nematoda :-

1. Nematoda is also called Nemathelminthes. They carries three germ layers ( endoderm, ectoderm and mesoderm ) and therefore, said to be triploblastic.
2. They are said to bilaterally symmetrical, i.e. both right and left of its body is said to be a mirror image of each other and are exactly same.
3. They carries a flexible cuticle outside thier body.
4. Some of the nematoda lives in soil and water, whereas most of these organisms are parasitic in nature.
5. They don't have a respiratory and circulatory system.
6. They have separate genders, i.e. they are unisexual and the female are involved in the production of eggs.
7. Examples - Wuchereria ( also called Filarial Worms ), Ascaris, etc.
8. These parasitic organisms are known to cause a disease called elephantiasis in which leg swells of a patient.