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Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

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Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Diagram of a flagellate stramenopile cell, showing characteristic flagellar hairs. Diagram of a flagellate stramenopile cell, showing characteristic flagellar hairs.
The major skeletal muscles—anterior superficial view. The major skeletal muscles—anterior superficial view.
The major external features of a neuron. The major external features of a neuron.
Comparison of Type 1 Diabetes to Type 2 Diabetes Comparison of Type 1 Diabetes to Type 2 Diabetes
IgM only, then IgD and IgM on the surface of a B cell. IgM only, then IgD and IgM on the surface of a B cell.
Cytotoxic T Cell Killing a Cancer Cell Cytotoxic T Cell Killing a Cancer Cell
Video: Rh blood type and complications during pregnancy & Fertilization

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