Why are increasing numbers of animals used in repetitive experiments?
Repetition of some experiments must occur for a variety of scientific reasons. The validation of data is critical to minimize or discover potential error. Experiments must be repeated to account for even the slightest change in variables such as dosage, temperature, and weight. Why can’t alternatives, such as computer models and cell and tissue cultures, replace animals in medical research? Computer models and tissue cultures are often used in conjunction with animal testing. However, a computer simply can’t mimic the complexities of an entire biological system. That’s why animals are used. Computer models and cell cultures can be used to determine toxic levels of substances early in the experiment, but final tests must be done on a living animal. Even the most sophisticated technology cannot mimic the complicated interactions among cells, tissues, and organs that occur in humans and animals. Scientists must understand these interactions before giving a new treatment or substance to hu
