« previous next »
« previous next »
 

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Tree species richness in North America is correlated with evapotranspiration rate. Tree species richness in North America is correlated with evapotranspiration rate.
(a) Pronghorn, native grazers of the temperate grasslands of North America. (a) Pronghorn, native grazers of the temperate grasslands of North America.
Polio eradication campaign in Georgia in the 1950s. In the 1950s, 20,000 cases of polio occurred ... Polio eradication campaign in Georgia in the 1950s. In the 1950s, 20,000 cases of polio occurred ...
Top Ten States Ranked by Rate or Reported Bacterial STI Cases in 2011 Top Ten States Ranked by Rate or Reported Bacterial STI Cases in 2011
North America North America
Government in America: People, Politics, and Policy, AP Government in America: People, Politics, and Policy, AP
Video: Rods and Cones Animation

For a complete list of videos, visit our video library