« previous next »
« previous next »
 

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

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

Examples of cell types derived from ectoderm, mesoderm, and endoderm. Examples of cell types derived from ectoderm, mesoderm, and endoderm.
Schematic of typical animal cell depicting the various organelles and structures. Schematic of typical animal cell depicting the various organelles and structures.
Plant Cell Plant Cell
Amyloid plaques (stained blue) in the brain of a deceased patient who had Alzheimer’s disease. Amyloid plaques (stained blue) in the brain of a deceased patient who had Alzheimer’s disease.
Visual fields of the eye and the visual pathway to the brain Visual fields of the eye and the visual pathway to the brain
Split-brain patients were shown composite photographs Split-brain patients were shown composite photographs
Video: Medullary osmotic gradient - influencing factors

For a complete list of videos, visit our video library