Sherwood is a city in Washington County, Oregon, United States. Located in the southeast corner of the county, it is a residential community in the Tualatin Valley southwest of Portland. As of the 2010 census, Sherwood had a population of 18,194 residents. The city's population for 2014 was estimated to be 18,978 by the U.S. Census.
arthrology definition: Noun (uncountable) 1. (anatomy) The branch of anatomy dealing with the joints...
An arthropod is an invertebrate animal phylum Arthropoda, and include the insects, arachnids, crustaceans, and others. Arthropods are characterized by their jointed limbs and cuticles. The skeletal system in the phylum, arthropoda, is made up of invertebrate and insects with exoskeletons.rachnids also have two further pairs of appendages that have become adapted for feeding, defense, and sensory perception. They have no antennae or wings. Their body is organized into two tagmata called the prosoma, and the opisthosoma.