« previous next »
« previous next »
 

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

Anatomy of the skin. Illustration of a section of skin showing key structures. Anatomy of the skin. Illustration of a section of skin showing key structures.
Oral cavity and pharynx Oral cavity and pharynx
Diagram of a section of a 15th-century oil painting Diagram of a section of a 15th-century oil painting
Subsections within the surgery section. Subsections within the surgery section.
A cross section of a typical wax-actuated thermostat showing the position of the wax pellet and ... A cross section of a typical wax-actuated thermostat showing the position of the wax pellet and ...
Sagittal section through brain and spinal cord showing the reticular formation Sagittal section through brain and spinal cord showing the reticular formation
Video: Male Reproductive System - Testosterone

For a complete list of videos, visit our video library