Early Evidence for Human Reliance Upon a Natural Perspective.
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Transcript of Early Evidence for Human Reliance Upon a Natural Perspective.
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Early Evidence for Human Reliance Upon a Natural
Perspective
Early Evidence for Human Reliance Upon a Natural
Perspective
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Prehistoric Period
• Learning by trial and error• Rich natural history knowledge• Information not written down
(paper & writing developed ~5K
years ago)
• Crops Domesticated
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When did the study of science begin?
Paleolithic paintings on cave walls and recordings on bones- observations
32,000 years ago
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When did the study of science begin?
Mesopotamian7,000 B.C. to 6th century B.C.
Bronze surgical knives
Medical text
Astronomy
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Ancient Greece
Hippocrates (460 – 370? B.C.)
• Greek physician• Diseases have natural causes• Rejected view that disease caused by evil
spirits• Believed that the brain was area of higher
thought and emotion, not heart• Program for good health: rest, good
nutrition, and exercise.
• Started “Western Medicine”
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Galen (130 - 200 A.D.)• Anatomy & Physiology• disease resulted from an internal
imbalance of the four humors• Mistakes in understanding circulation• Research based on ape dissection• Textbook used for 1000 years
Roman Times
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Dark Ages- 200 to 1200 A.D.
• Sad time
• Little new knowledge
• Taboo against dissecting human
cadavers continued
• Avoided actual involvement
• Authority prevails
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da Vinci(1452-1515)
• Anatomy & Physiology
Renaissance
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Renaissance
Vesalius dissects a female cadaver in his anatomy lab
Vesalius (1514-1564)• Anatomy & Physiology• Followed Galen’s
writings, but later found he was wrong
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Medieval Human Anatomy Before Vesalius
Medieval Human Anatomy Before Vesalius
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Vesalius’ ImagesVesalius’ Images
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The female pelvic anatomy. From Vesalius's De Corporis Humani Fabrica, 1543.
Vesalius’ ImagesVesalius’ Images
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MicroscopeMicroscope
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Anton van LeeuwenhoekAnton van Leeuwenhoek
1632 - 1723
Invented a simple microscopeDiscovered bacteria, protists, sperm cells, blood cells…
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Leeuwenhoek’s MicroscopeLeeuwenhoek’s Microscope
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Leeuwenhoek’s“Animalcules”
Leeuwenhoek’s“Animalcules”
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Robert HookeRobert Hooke
1635 - 17031635 - 1703
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1578-1657
William Harvey
Discoveries• Disproved Galen that blood not
made from the liver• Heart is a pump not a suction
device• Showed closed circuit circulation• Showed existence of valves in
veins
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Arteries & Veins
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Circulation
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1600’s Medicine: LeechesA prescription leech at the Harborview Medical Center pharmacy.
Leeches and Maggots make a comeback
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Ct Scan
3D reconstruction of CT Scan. Objects are packets of cocaine.
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MRI
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Pill cam Smartphone apps
Modern Technology
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Inquiry
1. Galen’s textbook was based on research of ______ not humans.
2. What did Velsalius discover? 3. Leeuwenhoek, Hooke, and Galileo
invented the____.4. List 4 modern “non-evasive” technologies
that allow us to look in the body.