Book Lungs And Book Gills

The book lungs located inside the arachnid are made up of several thin membranes somewhere between 10 and 80 depending the species.

Book lungs and book gills. Let s take a moment to explore the form and function of the horseshoe crab s. Creatures like primitive spiders have book lungs they live in air but usually. Thus i had a number of questions concerning book gills and book lungs.

A both assertion and reason are true and reson is the correct explanation of assertion. Book gills are flap like appendages that effect gas exchange within water and seem to have their origin as modified legs. Book gills are still found in horseshoe crabs which have five pairs of them the flap in front of them being the genital operculum which lacks gills.

In the abdomen consists of book lungs and tracheae. R excretion takes place through malpighion tubule is in arthropods. Fish and aquatic animals have gills for breathing.

One of the long running controversies in arachnid evolution is whether the book lung evolved from book gills just once in a common arachnid ancestor or whether book lungs evolved separately in several groups of arachnids as they came onto land. Microwhip scorpions harvestmen acarina pseudoscorpions ricinulei and sunspiders. Some have a pair of book lungs others have several pairs.

I was planning for it to breathe through book gills or book lungs but wanted to make sure my design is biologically possible. B both assertion and reason are true but reason is not the correct explanation of assertion. I read that the book gills of horseshoe crabs differ from book lungs in being external structures while book lungs are internal.

A arthropods have respiratory organs like gills book gills book lungs or tracheal system. Book gills are type of gills found in some aquatic arthropods like horshoe crab and composed of numerous membranous structures arranged like leaves of the book resembling the closed book. Book gills are found externally while book lungs are found internally.