Galen’s principal interest was in human anatomy, but Roman law had prohibited the dissection of human cadavers since about 150 BCE.
Because of this restriction, Galen performed anatomical dissections on living and dead animals, mostly focusing on pigs and
primates.
This work turned out to be particularly useful because in most cases, the anatomical structures of these animals closely mirror those of humans. Galen clarified the anatomy of the trachea and was the first to demonstrate that the larynx generates the voice.
Galen may have understood the importance of artificial ventilation, because in one of his experiments he used bellows to inflate the lungs of a dead animal.
Among Galen’s major contributions to medicine was his work on the
circulatory system. He was the first to recognize that there were distinct differences between
venous (dark) and
arterial (bright) blood. Although his many anatomical experiments on animal models led him to a more complete understanding of the circulatory system,
nervous system,
respiratory system and other structures, his work was not without scientific inaccuracies.
Galen believed that the circulatory system consisted of two separate one-way systems of distribution, rather than a single unified system of circulation. His understanding was that venous blood was generated in the liver, from where it was distributed and consumed by all organs of the body. He posited that arterial blood originated in the heart, from where it was distributed and consumed by all organs of the body. The blood was then regenerated in either the liver or the heart, completing the cycle.
Galen also believed in the existence of a group of blood vessels he called the
rete mirabile, near the back of the human brain.
Both of these theories of the circulation of blood were later shown to be incorrect. -
Wikipedia
1 comment:
Very sad to hear about this! I'm rather surprised, too, because when I was in Turkey the country seemed very keen on making as many of its ancient sites as accessible as possible.
(Another note: one of the books you have listed there (Galen: My Life in Imperial Rome) is not about Galen the physician at all. Just thought I'd mention...)
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