LEONARDO DA VINCI

NOTES AND DRAWINGS

THE HEART

AND ITS

Anatomical Constitution

WITH SOME DETAILS ON THE RESPIRATORY SYSTEM, MYOLOGY The study of the muscular system. AND THE ABDOMINAL VISCERA The internal organs of the abdomen.

UNPUBLISHED FOLIOS, REPRODUCED FROM THE ORIGINALS

PRESERVED

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PARIS

ÉDOUARD ROUVEYRE, PUBLISHER

76, RUE DE SEINE, 76

1901 original: "MDCCCCI"

Printed Edition of One Hundred Copies.

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THE

HEART

AND ITS

Anatomical Constitution

THE ANATOMY OF LEONARDO DA VINCI

THE ORGANS OF RESPIRATION AND THE HEART

Observations on the Movement of the Air

The windpipe original: "aspre arteria" or trachea does not change its position during the act of breathing, but rather it is the lung that expands and contracts against the ribs of the chest. Note how the ribs must expand to allow for the fullness of the breath.

It is observed that the heart is a muscle of great strength, much more powerful than the other muscles. The heat of the heart is generated by the rapid motion of the blood. I have found that the heart is not the...