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Author Question: Which of the following is a feature of peristalsis? a. It occurs when longitudinal muscles oppose ... (Read 29 times) |
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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.
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There are 60,000 miles of blood vessels in every adult human.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.