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Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

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Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

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There are 20 feet of blood vessels in each square inch of human skin.

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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

The segmented body plan of an annelid, as illustrated by an earthworm. The segmented body plan of an annelid, as illustrated by an earthworm.
Thorax Anterior view of human body Thorax Anterior view of human body
body systems body systems
Living systems such as the human body consist of closely interrelated elements Living systems such as the human body consist of closely interrelated elements
Heart sounds in systole and diastole Heart sounds in systole and diastole
Bivalve Body Plan: Clam Bivalve Body Plan: Clam
Video: Skin Cancer

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