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Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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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.

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Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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

Communication between mating yeast cells. Communication between mating yeast cells.
Electronmicrograph showing a blood clot composed of fibrin, red blood cells, and tissue debris. Electronmicrograph showing a blood clot composed of fibrin, red blood cells, and tissue debris.
(A) Lymphatic vessel with valves within tissue cells; (B) photomicrograph of lymphatic vessel with v (A) Lymphatic vessel with valves within tissue cells; (B) photomicrograph of lymphatic vessel with v
Human embryonic stem cells forming rosettes, a sign of neural differentiation Human embryonic stem cells forming rosettes, a sign of neural differentiation
Human embryonic stem cells stained with Tra-1-60 (green) - a stem cell marker and nestin (red), a ne Human embryonic stem cells stained with Tra-1-60 (green) - a stem cell marker and nestin (red), a ne
Types of active transport into and out of cells. Types of active transport into and out of cells.
Video: Atrophy

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