A laboratory animal is an animal used in research and experimentation to study biological processes, test new drugs, or develop medical treatments. Common species include mice, rats, rabbits, and monkeys. These animals are chosen for their genetic, biological, or behavioral characteristics that make them suitable for specific scientific inquiries. Laboratory animals are often bred in controlled environments to ensure consistency and reliability in research results. Ethical guidelines, such as those set by the Institutional Animal Care and Use Committee (IACUC), govern their use to ensure humane treatment and minimize suffering during experiments.