Slow walking or crawling, Biology

Slow walking or Crawling

This type of locomotion is seen while the animal moves on the substratum. It involves a metachronal rhythm of action in the parapodia. Each fifth or sixth parapodium on one side of the body is at similar stage in the cycle of forward recovery stroke and backward effective stroke. During each efficient stroke (Power stroke) the parapodium on one side is turned down towards the ventral side on the substratum; the Parapodia also the setae protruded. The parapodia on the other sides of the segment is now raised toward the dorsal side and carried forward in a recovery stroke along with the setae withdrawn. Next the parapodia reverse their role, those which finished backward effective stroke perform the forward recovery stroke and vice versa. Polynoids or scale worms are extremely efficient walking annelids. During these movements, the parapodia and setae work against the substratum. Though, they are not employed as paddles.

Posted Date: 2/4/2013 2:11:30 AM | Location : United States







Related Discussions:- Slow walking or crawling, Assignment Help, Ask Question on Slow walking or crawling, Get Answer, Expert's Help, Slow walking or crawling Discussions

Write discussion on Slow walking or crawling
Your posts are moderated
Related Questions
S a u s a g e classification Classification                                      Examples Cooked-smoked                               Frankfurters, Bologna, Mortadel

COMMON DISEASE OF PIG  - 1 .       FOOT AND MOUTH DISEASES 2 .       ANTHRAX 3 .       TUBERCLOSIS 4 .       SWINE FEVER - Charactrized by high fever, d

Phylum Rhodophyta (Red algae) 1) The photosynthetic pigments include red pigments (phycoerythrin) and blue pigment (phycocyanin) apart from chlorophyll, of which red pigment pr

steps in urine formation and the organs/tissues involve in such process?

muscles amd its types

PSYCHOSOCIAL THERAPY: Psychosocial therapy is one of  the important treatment modaIities used for the patients with mental disorders. It is given along with other therapies or

What is the significance of Elastic capsule chromatophore? Specialized pigmented cells on surface of the cephalopods that, by changing their shape, expose differing amounts of

A patient has total destruction of all of the beta-islet cells of the pancreas.  Prior to receiving treatment, this patient will have A. high blood plasma levels of glucose.

ARTIFICIA L KIDNEY - Dialysis employs the process of diffusion across a semipermeable membrane to remove unwanted urea . Dialysis is of 2 types - 1. Haemodialysis -

Insulin Devices - Insulin Pen Insulin pen is an insulin injection system. A pen consists of disposable needle, a vial of insulin and a pen. There are two pen systems replac