WEEK 11 (17th century) Flashcards
When was the discovery of the circulation of blood?
17th century
The first suggestion of the existence of the pulmonary circulation was found in __________________
Ibn an Nafis
In the west, the first hint was given in a book written by Spanish physician _______________
Michael Servetus
Who was William Harvey?
- Credited for establishing the fact of the circulation of the blood
- Proved circulation with morphological, mathematical and experimental arguments from dissection of animals
- Concerned only with mechanical process of circulation
- No Gaelic theory of “spirits”
_______________ showed that in order to move from right to left side of heart all blood had to pass through the lungs
William Harvey
What was the first proof of the circulatory system?
- Structure of valves of the heart
- Structure of great vessels
- Absence of pores in septum
- Location of vessels which short-circuit the lung in foetal circulation
What was the second proof of the circulatory system?
- Mathematical and quantitative in nature
- Measured the mass of blood that passed through the heart in a given time
- Showed that the blood mass could be kept constant only in a system of circulation
Describe how experimentation with snakes proved Harvey’s hypothesis of the one-way bloodstream
Ligation of the vena cava left the heart EMPTY whilst ligation of the aorta ACCUMULATED BLOOD IN THE HEART -> confirmed Harvey’s hypothesis of the one-way direction of the bloodstream
Where was there a gap in Harvey’s arguments?
Without the use of the microscope he was unable to show how blood circulated from the arteries into the veins
Who discovered capillaries?
Malpighi
Who wrote De Generatione Animalium published in 1651?
William Harvey
___________ opposed the theory of Preformation but favoured epigenesis
Harvey
What changes did Harvey’s discovery bring?
- The possibility of injecting medications intravenously
- The possibility of transfusing blood
Intravenous injections started in the 17th century, did not get taken up again until the 19th century but did not become safe until the _______ century
20th
Who was Robert Boyle?
- English chemist who founded the English Royal Society
- Animal life is not dependent on air but on a specific component of air (oxygen)