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.
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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
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There are approximately 3 million unintended pregnancies in the United States each year.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
Multiple crossovers can include more than two chromatids
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Withdrawing Medication from Single-Dose or Multiple-Dose Vials
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Drug inhibition of folic acid metabolism. Drugs inhibit multiple steps in the metabolic pathway ...