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William Harvey (1 April 1578 – 3 June 1657) [1] was an English physician who made influential contributions to anatomy and physiology. [2] He was the first known physician to describe completely, and in detail, pulmonary and systemic circulation as well as the specific process of blood being pumped to the brain and the rest of the body by the heart (though earlier writers, such as Realdo ...
In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. [ 1 ] [ 2 ] It includes the cardiovascular system , or vascular system , that consists of the heart and blood vessels (from Greek kardia meaning heart , and Latin vascula meaning vessels ).
Among Galen's major contributions to medicine was his work on the circulatory system. He was the first to recognize that there are distinct differences between venous (dark) and arterial (bright) blood. In addition to these discoveries, Galen postulated much more about the nature of the circulatory system. He believed that blood originated in ...
Galen also made the mistake of assuming that the circulatory system was entirely open-ended. [16] Galen believed that all blood was absorbed by the body and had to be regenerated via the liver using food and water. [17] Galen viewed the cardiovascular system as a machine in which blood acts as fuel rather than a system that constantly ...
The European Union has gone too far with artificial intelligence regulations, making it harder for global companies to deploy the technology in the region, said Aiman Ezzat, chief executive of ...
Senator Dan Sullivan on Wednesday urged Japan and other U.S. allies in Asia to get behind a multibillion-dollar gas project in his home state of Alaska, warning that if they were not interested in ...
The newly discovered manuscript of Ibn al-Nafis was translated by Max Meyerhof. It included critiques of Galen's theory, including a discussion on the pores of the heart. Based on animal dissection , Galen hypothesized porosity in the septum in order for blood to travel within the heart as well as additional help on the part of the lungs .
Saving a life or improving someone's quality of life is the ultimate act of kindness. Sometimes, it involves headline heroics, like rescuing someone from drowning.Other times the hero attracts ...