« previous next »
« previous next »
 

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

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?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Lip Abnormalities, Chancre from Primary Syphilis Lip Abnormalities, Chancre from Primary Syphilis
The respiratory system. (a) Sagittal section of the head and neck, revealing the organs of the upper The respiratory system. (a) Sagittal section of the head and neck, revealing the organs of the upper
Primary Visual Cortex Primary Visual Cortex
Graphs of Primary Trigonometric Ratios Graphs of Primary Trigonometric Ratios
Graphs of Primary Trigonometric Ratios Graphs of Primary Trigonometric Ratios
Primary growth in a root Primary growth in a root
Video: Mendel's Pea Experiment

For a complete list of videos, visit our video library