Questions tagged [physiology]

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Why was excess of blood believed to cause cheerfulness, hopefulness?

[ Etymonline : ] "blood-red," late 14c. (late 12c. as a surname), from Old French sanguin (fem. sanguine), from Latin sanguineus "of blood," also "bloody, bloodthirsty," from sanguis (genitive ...
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368 views

Why was yellow bile/choler believed to cause anger?

According to Etymonline, "choleric" derives from from Greek kholera "a type of disease characterized by diarrhea, supposedly caused by bile" with bile being "khole", so called for its color, greenish-...
3
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What did William Harvey think the stroke volume of a heart was?

I saw this quote in Richard Burton's Physiology by the Numbers Let us therefore take it that in a man the amount of blood pushed forward in the individual heartbeats is half an ounce, or three ...
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Grey Walter and Norbert Wiener Regarding Holism

Grey Walter writes: ``Even in the very simplest system, with two active elements, multiple interconnection between elements give several modes for which simple observation is useless. The study of ...
7
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1answer
1k views

When did humans realize that sex leads to pregnancy?

When did primates, protohumans, or humans make the connection between sexual activity and pregnancy? I notice that many ancient statues depict pregnancy or penises, this may (tenuously) suggest that ...
13
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464 views

Four temperaments and medical methodology

One of the traditional ideas about personality was Temperament Theory which probably originated from Egypt and was developed by Hippocrates into a medical theory. In the tenth century, it was extended ...