Answer: The structure and function of the body.
Explanation:
Physiology is a branch of biology that studies the human body, its composition, and its functioning.
During the Middle Ages studying the human body involved many taboos, and knowledge of its functioning was limited and full of magical assumptions.
Leonardo da Vinci is a renowned artist, architect, and engineer of the Renaissance, he is known for his inventive mind and study of various subjects. Among them, human physiology. Da Vinci made 240 drawings where he detailed the function of various parts of the human body. However, these physiological sketches were not published when he was alive.
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