Although appearances can be deceptive, there are considerable biological similarities between humans and animals. At the physiological and anatomical level, the similarities are remarkable. Animals ranging from mice to monkeys have the same organ systems, which function in a very similar manner to that of people. This means  that many human and animal diseases are also highly
similar. Tas Gohir at Royal Veterinary College (RVC) reckons that for the purpose of human therapeutic development, it is a question of identifying which animals have physiological and biochemical systems of interest, that are sufficiently similar to human.

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