Phar Lap’s heart was removed immediately after death by the stable vet Bill Nielsen, who mounted it in preserving fluid and dispatched it to Sydney. There, it had been requested by Dr Stuart McKay, who had an interest in racehorse physiology and was eager to see what insights the heart might give. Phar Lap's heart was unusually large – 6.2 kg against the average 4 kg size of a horse's heart. A triangular section has been removed, which it is believed was taken for a biopsy. McKay suggested that the heart be donated to the Australian Institute of Anatomy in Canberra The heart is preserved as a ‘wet specimen’ submersed in a formalin solution, sealed inside a rectangular clear perspex container. Other parts of Phar Lap are held by other museums – his skeleton is at the Museum of New Zealand Te Papa Tongarewa, and his hide is at Museum Victoria. https://digital-classroom.nma.gov.au/images/phar-laps-heart