Put pictures inside letters ivinci6/5/2023 ![]() ![]() He sees the vascular system as a one-way street and therefore believes that the narrowing of the vessels starts near the source of sustenance, that is the digestive system. 5 It is important to realise that Leonardo was not aware of the concept of Circulation. ![]() ![]() Leonardo continues: ‘the old who enjoy good health die through lack of sustenance, and this is brought about by the continuous narrowing of the passage of the mesenteric vessels by thickening of the coats of these vessels’. Then Leonardo did something remarkable for a man without medical training: ‘I made an autopsy in order to ascertain the cause of so peaceful a death, and found that it proceeded from weakness through the failure of blood and of the artery that feeds the heart and the other lower members, which I found to be very dry, shrunken and withered.’ 4 Since ‘the artery that feeds the heart’ also feeds ‘lower members’, this passage does not refer to a coronary artery but probably to the aorta. However, while Leonardo was at his bedside, the centenarian suddenly passed away ‘without any movement or sign of anything amiss’. Somewhere between 15, Leonardo da Vinci (1452–1519) met a very old man in the hospital of Santa Maria Nuova in Florence, who told him he was a hundred years of age and did not feel, in Leonardo's own words, ‘any bodily ailment other than weakness’. ![]()
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