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
Prior to the solving of the structure of DNA, Erwin Chargaff calculated the amounts of the four nucleotides (A, T,G,C) and made which of the following conclusions? A. All four

Hypoglycaemia is defined as state of low blood glucose level of less than 50mg/dl. Low blood sugar level varies from person to person. Causes Since hypoglycaemia can occur in

Explain the Glass Test Tubes - Food Microbiology Sterile glass tubes are used for culturing microorganisms in liquid or solid media. Sterility in tubes is maintained by using c

Q. What are changes in ST-Segment? Normal Exercise Electrocardiogram ST and J Point As the heart rate increases with exercise, a number of predictable changes occur in a

State the process of metabotropic receptors Consider a system that contains two neurons and one cardiac SA node cell in a culture dish bathed in normal physiological saline.  A

What are the causes of obesity - Etiology? However simple the question may sound, the answer to it is not all that simple. We cannot deny that excess weight results from positi

Classification of Freshwater Ecosystems Fresh water ecosystems depend on the terrestrial ecosystems for large quantities of organic and inorganic matter which are constantly a

Explain the Factors Affecting GI of Foods? A variety of factors affect GI of foods. The factors which affect the rate of glucose absorption from starchy foods and therefore the

How does the odor of flower petals help pollination? The purpose of the perfume is to attract a pollinator - insect, bat, bird or whatever. The reward for the pollinator is a m

Describe the Clinical Evaluation MVP Murmur in details? Characteristic: Mid systolic click followed by a late systolic murmur which usually extends to A2. The click may be abse