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Author Question: What study design involves no intervention on the part of the researcher? (Choose all that apply.) ... (Read 74 times) |
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
Your heart beats over 36 million times a year.
Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.