English
363 ft
16mm
Colour
Optical
"As part of the general program of heart research, studies are being made to determine how the body's blood pressure can compensate for sudden and extreme differences in elevation. At the San Diego Zoo, the long-necked animals - the giraffe, the horse and the llama - are used in this research project. By surgical procedure, devices are inserted in the animal's body which measure and record the external actions and the internal natural control mechanism of the heart. The information compiled from these studies will aid greatly in man's effort to understand the complexities of the body" PSA Journal, Oct. 1963, 41.
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