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).
Did you know?
It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
Mucus block in bronchiole
HEART STRUCTURE 1
Heart
Internal Heart Anatomy
A camshaft position actuator used in a cam-in-block engine.
The heart and its major blood vessels. Oxygen-rich blood is pumped from the lungs to the left