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Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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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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The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

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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.

Hematuria. An analysis of urine is performed to evaluate kidney function. In this illustration, the Hematuria. An analysis of urine is performed to evaluate kidney function. In this illustration, the
Lithotripsy. The direction of a sound pulse crushes the stones into smaller fragments that can be pa Lithotripsy. The direction of a sound pulse crushes the stones into smaller fragments that can be pa
Urinalysis. During a simple urinalysis, a stick with colored blocks is dipped into a urine specimen. Urinalysis. During a simple urinalysis, a stick with colored blocks is dipped into a urine specimen.
Urine output. Urine output.
Urine pH scale. Urine pH scale.
Secretion of H+ in the urine and synthesis of new HCO3– Secretion of H+ in the urine and synthesis of new HCO3–
Video: Depolarization of the SA node, Action potentials of the myocardium & ANS effects

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