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Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Plastid composition of egg cells from green, white, and variegated four-o'clock plants. Plastid composition of egg cells from green, white, and variegated four-o'clock plants.
Segregation of B cells and T cells in a lymph node Segregation of B cells and T cells in a lymph node
Examples of four different types of cells from the body. Although each cell has a cell membrane, nuc Examples of four different types of cells from the body. Although each cell has a cell membrane, nuc
Flow cytometry. Cells expressing the surface markers CD4, CD8, and CD3 are labeled in a direct ... Flow cytometry. Cells expressing the surface markers CD4, CD8, and CD3 are labeled in a direct ...
Imaging cell surface glycoproteins in living cells Imaging cell surface glycoproteins in living cells
T Cells: Development of Self-Recognition and Self-Tolerance T Cells: Development of Self-Recognition and Self-Tolerance
Video: Acid-base imbalances - respiratory acidosis and alkalosis

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