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Author Question: Heavy precipitation in the humid tropical climates is due to ____. a. warm, humid air and unstable ... (Read 133 times) |
Blood is approximately twice as thick as water because of the cells and other components found in it.
Women are 50% to 75% more likely than men to experience an adverse drug reaction.
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
The familiar sounds of your heart are made by the heart's valves as they open and close.