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Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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The human body produces and destroys 15 million blood cells every second.

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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Insulin, glucagon, and blood glucose Insulin, glucagon, and blood glucose
Blood Flow Through the Cardiorespiratory System Blood Flow Through the Cardiorespiratory System
Formation of a blood clot Formation of a blood clot
ABO blood types pedigree ABO blood types pedigree
X-ray showing pneumonia. Fluid and blood cells fill the lungs X-ray showing pneumonia. Fluid and blood cells fill the lungs
Branching Blood Vessels Branching Blood Vessels
Video: Fetal Development of the Cardiovascular System

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