Burrowing - mechanics of locomotion, Biology

Burrowing - Mechanics of Locomotion

Some polychaetes are burrowing. Instance is glycerides and capitellidae. Their parapodia are smaller. Burrowing is done by protrusion of proboscis. After that, proboscis is withdrawn into the body and, and the animal crawls in that space. Burrowing in polychaete is different from that in oligochaetes. Oligochaetes depict crawling and digging or burrowing movement. The action of longitudinal and circular muscles on the coelomic fluid creates a peristaltic wave; while the setae, which are fewer in number and are shorter assist in, getting a local grip on the substratum. Neural connections help-in coordinating the peristaltic action by alternate stretching and contraction of muscles. The digging or burrowing action is accomplished by the forward extension of the anterior segments into the spaces of the soil particles. Increase in hydrostatic pressure now causes widening of the space. Now, the animal pulls the posterior part of the body forward.

Posted Date: 2/4/2013 2:19:37 AM | Location : United States

Related Discussions:- Burrowing - mechanics of locomotion, Assignment Help, Ask Question on Burrowing - mechanics of locomotion, Get Answer, Expert's Help, Burrowing - mechanics of locomotion Discussions

Write discussion on Burrowing - mechanics of locomotion
Your posts are moderated
Related Questions
What do numeric pyramids represent? Numeric pyramids show the number of individuals in each trophic level of a food chain.

Was there molecular oxygen in the earth's primitive atmosphere? How has that molecule become abundant? The presence of the molecular oxygen in the primitive atmosphere was prob

What is Hansen's disease (etiological agent, mode of transmission, clinical manifestations and prevention)? The etiological agent of Hansen's disease is bacteria known as Mycob

Degradation of Ecosystem Ancient man was simple-minded food gatherer and hunter. He looked upon nature with awe and respect and in fact he worshipped it. But from the time he

Describe Surgical Closure of Patent Ductus Arteriosus technique? The patient is positioned in right lateral position and a left posterolateral thoracotomy is done. In infants

Define the term - magnetoencephalography A variant ERP known as magnetoencephalography (MEG) has been developed. MEG, which is still in its infancy, requires upward of 60 elect

What is d excretory organ of the agama lizard

Maxillary Tuberosity Incision and reflection of the mucosa overlying the areas of the maxillary tuberosity and hamular notch when taking impressions for maxillary subperiosteal

Determine the uses of Iron - Soil Iron is a constituent of cytochromes, haem and non-haem enzymes. It is also essential for chlorophyll formation though is not a part of it. It

Q. On which organelle of the cell structure does intracellular digestion depend? What is the chemical content of those organelles? Intracellular digestion take place by the act