There are several reasons why the use of animals is critical for biomedical research:
• Animals are biologically very similar to humans. In fact, mice share more than 98% DNA with us!
• Animals are susceptible to many of the same health problems as humans – cancer, diabetes, heart disease, etc.
• With a shorter life cycle than humans, animal models can be studied throughout their whole life span and across several generations, a critical element in understanding how a disease processes and how it interacts with a whole, living biological system.