BPS 1101 Lecture 11: 11 - Heart
16 Jun 2016
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Gladiator wounds provide first glimpse of function: as long as the gladiator was alive, scientists could observe inner body function (because of large wounds) William harvey (1578 1657: credited with figuring out what the heart actually does. Ibn al-nafis (1210 1288: was the first person to correctly describe the circulatory system. Heart pumps 2. 6 billion times during your life: 5 to 6 litres each minute, 100 000 km of blood vessels. Coronary vessels feed the heart: heart attack = blockage in coronary vessels. Many deaths from heart problems are avoidable: tobacco, obesity, diet. Smoking kills the heart: hemoglobin carrier o2 in the blood, co sticks to hemoglobin better than o2, lack of o2 damages the heart and blood vessels. Obesity kills by overworking the heart: rather than having 100 000 km of blood vessels, an obese person may have. Diet high in fruits and vegetables is beneficial.
