Animal studies involve using non-human animals in experiments to study behavior and biological systems while controlling variables. Common animal types used include mice, rats, rabbits, guinea pigs, dogs, and cats. There are several types of animal studies including in vivo, in vitro, and ex vivo studies. Animal research is one type of medical research used to understand how the body works and develop new medicines by testing for safety and effectiveness before human trials. Common applications include using rats to test diabetic and cancer drugs, mice for toxicity testing, and dogs to study anti-hypertension drugs.