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 After that, proboscis is withdrawn into the body and, and the animal crawls in that space.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
Noise Pollution - Environmental Pollution Noise is unwanted sound or excessively high levels of sound. Noise pollution is not only an annoyance, but at sufficiently high level

what are the gonad gland disorders and what do they do

Calculate the pH: 300mL of 0.25M sodium ascorbate plus 150mL of 0.2M HCl (the pKa of ascorbic acid is 4.04) okay, what's the conjugate acid and base of this problem? Can someone wa

Explain Some food applications of pectin As with other viscous polyanions such as carrageenan, pectin may be protective towards milk casein colloids, enhancing the properties (

Define the Criteria for Assessment of Thiamin Status? Thiamin status has been assessed by measuring urinary thiamin excretion under basal conditions or after thiamin loading, t

What is the main moral problem about the cloning of human individuals? As well biological perils, a very serious moral problem involves the nucleus transplantation technology c

what is origin ofspharosome

Width of Attached Gingiva at Implant Site The zone of attached gingiva needs to be intact and of adequate width to protect (by separating) the tissue around the implant. If it

Q. What do you mean by Wound closure? Generally the incisions designed for minimal exposure such as the H - shaped incision, do not require suturing, as the abutment and the tr

Distribution Coefficient - Terminologies used in Chromatography? During the purification or separation of the biomolecules it should be kept in mind that two important factors