Book Gills Definition Zoology

These appendages move rhythmically to drive blood in and out of the lamellae and.

Book gills definition zoology. On the inside of each appendage over 100 thin page like membranes lamellae appearing as pages in a book are where gas exchange takes place. Each book gill looks like a flap and as they move they push water over the lamellae which are the thin membranes located within the book gills. Source for information on gill book.

Also called gill book. Book gill definition the gill of a horseshoe crab composed of numerous membranous structures arranged like the leaves of a closed book. The gills of some species such as hermit crabs have adapted to allow respiration on land provided they are kept moist.

In aquatic arachnids any of several pairs of external gills that each contain numerous fine lamellae. The book lungs located inside the arachnid are made up of several thin membranes somewhere between 10 and 80 depending the species. A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water and excretes carbon dioxide.

The microscopic structure of a gill presents a large surface area to the external environment. Book gill definition is a gill found in the horseshoe crabs that consists of membranous folds arranged like the leaves of a book. Now only found in horseshoe crabs book gills are thought to be ancestral to book lungs.

Branchia is the zoologists name for gills. A dictionary of zoology dictionary. Some have a pair of book lungs others have several pairs.

Gill book gills composed of a series of plates resembling the pages of a book.