Animal Organ Systems and Homeostasis Homeostasis describes the physical and chemical parameters that an organism must maintain to allow proper functioning of its component cells, tissues and organs. http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookANIMORGSYS.html Maricopa.edu~Site InfoWhoisTrace RouteRBL Check
Terrestrial Vertebrates Describes the principle characteristics of tetrapods, which have well defined joints and digits, their classification and phylogenetic relationships. http://tolweb.org/Terrestrial_Vertebrates/14952 Tolweb.org~Site InfoWhoisTrace RouteRBL Check