Early beliegs about blood circulation
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Today,everyone knows that the blodd circulates around the body,but this has only been understood since 17th century.Here is some imformation about some of the people and ideas that existed before them.
Hippocrates was Greek physician (doctor) who lived between 460 and 377 BC.He though that the body contained four different substances called 'humours'.These were blood,phlegm,yello bile and black bile.For his time,he was an excellent physician and highly respected.
Galen was also Greek,He lieved about 500 years later than Hippocrates,but-like everyones else-he still followed Hippocrates's ideas.Amongs other jobs,he was chief physician to the gladiators in the town of pergamum.He knew that blood was contained inside blood
vessels,but he thought it just swished about in them,rather than following around the body.He also thought that blood went from one side of the heart to the other y seeping through little pores in the septum that divides the left side ot the heart from the right.He never dissected a human body, and he never did any experiments to check his ideas.But everyone belived him,and unquestioningly accepted these ideas for almost the next100 years.
Ibn-al-Nafis was a physician who was born in syria.He died in 1289.He was the first person to describe the circulation of the blood to the lungs where it becomes exygenated
Hippocrates was Greek physician (doctor) who lived between 460 and 377 BC.He though that the body contained four different substances called 'humours'.These were blood,phlegm,yello bile and black bile.For his time,he was an excellent physician and highly respected.
Galen was also Greek,He lieved about 500 years later than Hippocrates,but-like everyones else-he still followed Hippocrates's ideas.Amongs other jobs,he was chief physician to the gladiators in the town of pergamum.He knew that blood was contained inside blood
vessels,but he thought it just swished about in them,rather than following around the body.He also thought that blood went from one side of the heart to the other y seeping through little pores in the septum that divides the left side ot the heart from the right.He never dissected a human body, and he never did any experiments to check his ideas.But everyone belived him,and unquestioningly accepted these ideas for almost the next100 years.Ibn-al-Nafis was a physician who was born in syria.He died in 1289.He was the first person to describe the circulation of the blood to the lungs where it becomes exygenated
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