Crabs are generally covered with a thick exoskeleton, composed primarily of highly mineralized chitin, and armed with a single pair of chelae (claws). Crabs are found in all of the world's oceans, while many crabs live in fresh water and on land, particularly in tropical regions. Crabs vary in size from the pea crab, a few millimetres wide, to the Japanese spider crab, with a leg span of up to 4 metres (13 ft). About 850 species of crab are freshwater, terrestrial or semi-terrestrial species; they are found throughout the world's tropical and semi-tropical regions.
Quick Answer. A pluot is a hybrid fruit created by cross-breeding a plum and an apricot. Pluots do not occur in nature and were first created in the late 20th century.
Furnace Plenum. A plenum is a compartment, air space or chamber that is filled with air that is then distributed elsewhere. A furnace plenum then, is such an air chamber that gets filled directly (and quickly) by a large blower that is above, below or adjacent to it.Air ducts connected to a furnace or heater plenum carry this air to various registers around a house or building.his is exactly what your furnace plenum does before air is released and delivered. Other terms used for furnace plenum, are âsupply plenumâ or âintake plenum.â. Copyright Â© 2008-2015, HomeRepairgeek.com All rights reserved.