Parasitic Diseases. Photo by: Jubal Harshaw. Parasitic diseases are illnesses caused by infestation (infection) with parasites such as protozoa (one-celled animals), worms, or insects. These diseases are widespread in Africa, southern Asia, and Central and South America, especially among children.arasitic Diseases. Photo by: Jubal Harshaw. Parasitic diseases are illnesses caused by infestation (infection) with parasites such as protozoa (one-celled animals), worms, or insects. These diseases are widespread in Africa, southern Asia, and Central and South America, especially among children.
Definitions for tectonictÉkËtÉn Éªk. tectonic(adj) pertaining to the structure or movement of the earth's crust. tectonic plates; tectonic valleys. tectonic, architectonic(adj) of or pertaining to construction or architecture.
Plate tectonics is the science and study of the causes of, and  relative motions of, Earth's lithospheric plates.    The lithospheric plates are composed of the rocky â¦crust and  outermost rocky layer of the mantle which are fused together.