General Parasitology and Helminthology: Sense organs

Sense organs

SENSE ORGANS

Amphids

Amphids consist of a pair of depression on each side of head end well supplied by nerve fibres.
The amphids are situated either lateral or posterior lateral aspect of head end.
The function is ‘chemoreceptor’.

Phasmids

A pair of depression occurs on each side of tail end.
Earlier the phasmids were considered as important character for identification.
Nematodes with phasmids comes under Phasmidia, and without phasmids comes under Aphasmidia.

Cervical papillae

Eg. Oesophagostomum species. A pair of papillae occurs in the cervical region.
Papillae in the middle of body.

Genital papillae

In females, a pair of papillae occurs in vulval region.

Last modified: Monday, 16 April 2012, 5:49 AM

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VPA 211: General Veterinary Parasitology and Helminthology (3+1)

Sense organs

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