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Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

The Eukaryotic Cell The Eukaryotic Cell
Cell-mediated immunity, primary and secondary response. Cell-mediated immunity, primary and secondary response.
When the exhaust is rich, the PCM applies a negative current into the pump cell. When the exhaust is rich, the PCM applies a negative current into the pump cell.
(A) Slide the hand up the shoulder and neck to GB-20 and Bl-10. (B) Fingertip press or circular ... (A) Slide the hand up the shoulder and neck to GB-20 and Bl-10. (B) Fingertip press or circular ...
Animal Cell Animal Cell
The periodic table and its creator, Dmitry Mendeleyev. The periodic table and its creator, Dmitry Mendeleyev.
Video: Cognitive development by Piaget (Preoperational stage or intelligence)

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