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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.

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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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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Location of Breath Sounds, Anterior Thorax, Posterior Thorax Location of Breath Sounds, Anterior Thorax, Posterior Thorax
The Atmosphere’s Oxygen Came from PhotosyntheticOrganisms The Atmosphere’s Oxygen Came from PhotosyntheticOrganisms
Cyanosis as shown here at the patient’s fingertips results from a lack of oxygen in the tissues Cyanosis as shown here at the patient’s fingertips results from a lack of oxygen in the tissues
Normal oxygen sensor frequency is from about one to five times per second. Normal oxygen sensor frequency is from about one to five times per second.
Reactive oxygen species (ROS) Reactive oxygen species (ROS)
Structure of hemoglobin, the oxygen-transporting protein of red blood cells. It consists of four glo Structure of hemoglobin, the oxygen-transporting protein of red blood cells. It consists of four glo
Video: Proteins

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