We humans have somewhat sealed loop of blood circulating around, so how are we able to alter the blood pressure without “opening” a valve somewhere or something like that to let blood out/in(imagine a pipe with a valve)? Where does the pressure come and go to?
In: Biology
You open a “valve” thousands of times per day. It’s called your “mouth.”
When you open your mouth and drink water, for example, you’re adding fluid into the system that is circulated throughout your blood stream. Blood is not 100 percent blood cells. Much of it is water.
Your kidneys act as another “valve,” by removing excess water from your system in the form of urine. Similarly, many blood pressure medications act to lower blood pressure by increasing the rate at which water is removed from your system.
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