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Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Lycopodium obscurum growing on the forest floor. Lycopodium obscurum growing on the forest floor.
Thumb slides above and below the mouth. (A) Use the thumbs to stroke above the upper lip and then ... Thumb slides above and below the mouth. (A) Use the thumbs to stroke above the upper lip and then ...
Acid–Base Balance Acid–Base Balance
Nucleotide-Base Composition of Various Genomes Nucleotide-Base Composition of Various Genomes
The consequences of base-pair substitutions The consequences of base-pair substitutions
Video: Sister chromatids of a metaphase chromosome animation

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