Polychaetes - feeding and digestion in annelids, Biology

Polychaetes - Feeding and Digestion in Annelids

Polychaetes involve both free moving (errant) and sedentary species. The free moving species are usually macrophagous and the sedentary forms are microphagous. Nereis is an example of a free moving macrophagous polychaete. But Nereis can as well burrow and make use of its proboscis (buccal cavity and pharynx) for this aim. The eversible proboscis is a feeding organ. The pharynx is lined along with hooked jaws and is everted for seizing the prey. The genus Nereis includes species that are carnivorous. Some species of Nereis are omnivorous, feeding on diverse material like algae, invertebrates or detritus on the substratum. Some are scavengers. The tentacles and palps present around the mouth assist in the manipulation of food, besides serving sensory function.

Posted Date: 2/4/2013 3:06:05 AM | Location : United States







Related Discussions:- Polychaetes - feeding and digestion in annelids, Assignment Help, Ask Question on Polychaetes - feeding and digestion in annelids, Get Answer, Expert's Help, Polychaetes - feeding and digestion in annelids Discussions

Write discussion on Polychaetes - feeding and digestion in annelids
Your posts are moderated
Related Questions
Why in the preparation of a karyotype analysis is the use of a substance like colchicine interesting? The Colchicine is a substance that disallows the formation of microtubules

Explain Adverse effects of Atazanavir  Atazanavir causes indirect hyperbilirubinemia. It has had no adverse effects on lipid profiles, but the drug's long-term effects are unkn

why brains can''t be transplant?

What is Phylum Porifera in Classification of the Animal King? Sponges are the simplest form of animals. Their bodies are not organized in any specific pattern other than masses

When constructing phylogenies using maximum likelihood methods, you assume?

Q Comparing toxicity and the need for dilution in water how different are the uricotelic and ureotelic excretions? What are some examples of animals that present these respective t

What is excretion? Excretion in Physiology is the method of elimination of metabolic wastes and other toxic substances from the body.

Mitral valve prolapse (MVP) has emerged as a prominent, predisposing structural cardiac abnormality and in adults accounts for 7 to 30 per cent of NVE in cases not related to drug

Are there ribosomes in a plant cell? Yes, in fact there are ribosomes in both plant and animal cells. That is right. Ribosomes are the site of synthesis of polypeptide chain

Types of Community On the basis of size and degree of relative independence communities may be divided into two types: i) Major Community: These are large-sized, well org