NATURAL SCIENCE AND ISLAMIC PREVIEW OFCARDIOVASCULAR SYSTEM
Abstract: Interesting to discuss that in the first verse that was revealed that is alAlaq verse 1-5, Allah SWT uses the term blood as an inseparable part of the process of human creation. This proves that blood has an important role in human life. The purpose of writing this article is to determine the circulatory system or cardiovascular system by using Islamic science studies. The cardiovascular system of the human body consists of the heart, arteries, capillaries and veins which have various transportation methods in the process of transport and disposal of waste substances. In the heart there is an active transport process which causes the heart muscle to contract, from the contraction the heart provides the pump pressure needed to circulate the blood through the two main circulatory systems. The blood flowing through the vessels of each vessel has a constant discharge with a different flow velocity depending on the cross-sectional area of the vein being passed. Blood arteries are channeled to the capillaries. In capillaries there is an exchange of substances in each cell caused by hydrostatic pressure and osmosis. When blood reaches the vein the pressure is affected by the heart. This is because blood experiences resistance due to a lot of passing through the capillary vessels. The total pressure in the capillary drops from the end of the artery to the tip of the vein, so that blood flows along the capillary from the end of the artery to the vein. The flow of blood through the veins is the result of muscle work, so when the muscle moves it will put pressure on the blood vessels so that blood can flow back to the heart.