Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
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?
Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.
Did you know?
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Did you know?
Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
Sites of mtDNA mutations in certain human diseases
Human Modification: Environmental Issues
Human Anatomy
Replication of human immunodeficiency virus
human vs animal hand
Major bone (tan) and cartilage (light blue) elements of the human skeleton. Inset shows regions of v