Nematoda Lecture Notes

Flashcards about the Nematoda lecture.

What is another name for Nematoda?

Roundworms

Give three examples of Nematoda

Ascaris lumbricoides, Necator americanus, Ancylostoma caninum

What are three habitats of nematodes?

Aquatic, terrestrial, and parasitic

Are nematodes segmented or unsegmented?

Unsegmented

What do free-living nematodes feed on?

Bacteria, fungi, and other nematodes

What do parasitic nematodes feed on?

Plant and animal cells or absorb digested food in guts of higher organisms

What type of symmetry do nematodes exhibit?

Bilateral symmetry

What level of organization do nematodes exhibit?

Tissue level organization

What type of coelom do nematodes have?

Pseudocoelom

What are the chemosensory organs on the lips of nematodes called?

Amphids

What systems are absent in nematodes?

Circulatory and Respiratory systems

Do nematodes have circular muscles?

No, they only have longitudinal muscles

What covers the body of nematodes?

Cuticle

What type of reproduction do nematodes exhibit?

Sexual reproduction with internal fertilization

What type of sperm cells do nematodes possess?

Amoeboid sperm cells

What does the pharynx secrete in nematodes?

Digestive enzymes

How is the movement of food in the gut aided?

By body movements of the worm

What type of muscles are used for locomotion in nematodes?

Longitudinal muscles

How do nematodes transport nutrients and gases?

Through diffusion

What is the primary form of nitrogenous waste excreted by nematodes?

Ammonia

What the function of renette cells?

They help remove metabolic waste and secrete other substances used by the nematodes.

What structures are present for a sense of touch?

Sensory bristles and papillae

What structures are present on the body for chemoreception?

Amphids

How do nematodes reproduce?

Sexually with cross fertilization

What are two classes of Nematodes?

Enoplea and Chromadorea

List three impacts of Nematodes.

Parasites to animals, parasites in plants, and spread diseases in animals and plants

Name two effects of Nematodes on plants

Damage tissues and blockage of vessels

Name two effects of Nematodes on animals

Feed on blood and damage tissues and cause diseases

Name three diseases caused by Nematodes

Filariasis, Ascariasis, Trichonisis, Enterobiasis, Onchoceriasis, Trichuriasis, and Ancylostomiasis

Which nematode species causes Ascariasis?

Ascaris lumbricoides

What causes Filariasis?

Blockage of lymphatic vessels by filarial worms

Which nematode species causes Trichinosis?

Trichinella spiralis

Where do Ascaris lumbricoides live?

Intestines