Circulatory System

There are about 1.5 gallons (or 5.5 liters) of blood in the average adult body. Blood regenerates every second. Two million new red blood cells a second, to be exact. We all know that the circulatory system transports oxygen throughout the body. But did you know that it also transports electrolytes, carbon dioxide, hormones, and amino acids?


Blood consists of red cells, white cells, platelets, and plasma. The circulatory system closely relates to the lymphatic system. Lymph fluid is plasma that has filtered through the body and returned to the lymphatic system.


The circulatory system is prone to cardiovascular diseases. For example, stroke, hypertension, and heart failure affect these areas. Healthy eating, exercise, and restricting tobacco and alcohol intake prevent conditions like these. Certain conditions, like high and low blood pressure, are hereditary. It is important to know your family history. Inform your doctor of any history of heart problems.

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