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N emotoda

N emotoda. Germ layers. Nematodes are triploblastic meaning that they have three layers : the ectoderm, the endoderm, and the mesoderm. S ymmetry. Nematodes are bilaterally symmetrical. Coelom.

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N emotoda

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  1. Nemotoda

  2. Germ layers Nematodes are triploblastic meaning that they have three layers : the ectoderm, the endoderm, and the mesoderm.

  3. Symmetry Nematodes are bilaterally symmetrical

  4. Coelom Nematodes are pseudocoelomates, which means that the body cavities are lined with endodermis tissue and mesodermis tissues.

  5. Digestive tract Nemotodeshave a complete digestive tract which means that they have two openings: a mouth and a anus

  6. Cephalization Nemotodeshave a well developed nervous system which consists of 4 nerve ganglia and 6 longitudinal nerves that branch off of it which extend towards the mouth. A.K.A ganglial nervous system

  7. Segmentation Nematodes are different than many other different types of worms due to their lack of segmentation.

  8. Skeleton & appendages Nematodes lack a skeletal system but instead have a tough outer layer called the cuticle. It maybe strong, but it is also flexible and sheds a few times while maturing into an adult. Because of the lack of skeleton, nematods do not have any paired appendages.

  9. Circulatory system Nematodes do not have a working circulatory system, but instead are able to circulate fluid, located in the pseudocoelom, by their body movements

  10. Respiratory system Nematodes also lack a functioning respiratory system, they instead rely on diffusion for the continuous supply of new oxidized air.

  11. Reproduction Nematodes reproduce sexually, and have a six stage life process. Males can be distinguished from the females because they are slightly smaller and have a hooked tail.

  12. Habitat • Their are two main types of nematodes. Parasitic nematodes can be found in and on almost any type of plant or animal. • They thrive mainly in soil, but can withstand almost any climate due to cryptobiosis. • Cryptobiosis is the ability to suspend their lives until they find their way into more favorable conditions.

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