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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.

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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

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Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

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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.

These young adults look forward to a life together as they celebrate their wedding These young adults look forward to a life together as they celebrate their wedding
The ear. Lateral view of the ear region on one side of the head. The ear. Lateral view of the ear region on one side of the head.
Region’s Culture in International Context Region’s Culture in International Context
Region’s Culture in International Context Region’s Culture in International Context
The lacO region O1 containing an inverted repeat sequence The lacO region O1 containing an inverted repeat sequence
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