In U.S. at turn of the 20th century when a child was born, it would have been expected to live only into his ou her 40s, but nowadays it changed, the expectancy to live is about 70 years.

                   Medical research with laboratory animals, greatly help science to understand the functioning of organs and human health.

 - What's medical research that uses animals?
                   People and animals get some similar types of illnesses. The information that we gain from this researches is: how far an animal can be compared organically with humans.

- How do scientists decide to use animals in medical research?
                   All medical research is carefully planned, and this includes researchs with animals and humans. Because this fact, medical researchs are very safe, even with animals. A federal law says that every animal must be treated very well, just like a human.

- How are animals protected?
                   Scientists are so much attentive talking about cares that they need to take during an medical research. About the size of the cage, the temperature, the kind of food that they eat.

- Why do medical reseach with animals?
                   Understanding cell and organs - which is similar in all vertebrates - helps researchers design experiments to test new ways, but in people.