« previous next »
« previous next »
 

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

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.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Johannes Gutenberg, Page from the Forty-Two-Line Bible, Mainz. Johannes Gutenberg, Page from the Forty-Two-Line Bible, Mainz.
Comparison of a single-stranded RNA and a double-stranded DNA with their corresponding nucleobases. Comparison of a single-stranded RNA and a double-stranded DNA with their corresponding nucleobases.
Single-serve cups of infant formula Single-serve cups of infant formula
Testcross of a single character Testcross of a single character
Number line for rounding Number line for rounding
Amoeba, a single-celled heterotroph Amoeba, a single-celled heterotroph
Video: Osteoporosis

For a complete list of videos, visit our video library