Iatrogenic disease commonly refers to a physician-induced disease and more generally to a disease state caused by the commission of acts by the
Large aquatic reptile that lived in Mesozoic times and was particularly abundant in the Jurassic period. Fishlike in appearance, averaging 2–3
( ĭgwä'nə ), name for several large lizards of the family Iguanidae, found in tropical America and the Galapagos. The common iguana (Iguana iguana) is
The body's defence against foreign substances such as bacteria, viruses and parasites. Immunity also protects against drugs, toxins and cancer cells.
Invertebrates are animals that have neither a backbone nor a bony internalskeleton. This group makes up more than 95 percent of the animal kingdom. It
type of dentin present only in the tusks of the elephant . Ivory historically has been obtained mainly from Africa, where elephant tusks are larger