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Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

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.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Four levels of protein hierarchy Four levels of protein hierarchy
The age-dependent curve of salivary progresterone levels in three populations. The age-dependent curve of salivary progresterone levels in three populations.
Levels of protein structure: Quaternary structure Levels of protein structure: Quaternary structure
The diminishing effects on body weight of a low-calorie diet and a high-calorie diet. The diminishing effects on body weight of a low-calorie diet and a high-calorie diet.
Levels of organization in striated muscle Levels of organization in striated muscle
Per capita consumption of power is high in the developed world and highest in the United States Per capita consumption of power is high in the developed world and highest in the United States
Video: Introduction to Heart Attacks

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