« previous next »
« previous next »
 

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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.

Lateral view of the internal male reproductive organs. Lateral view of the internal male reproductive organs.
Relatively simple changes in Hox genes control limb formation in tetrapods. Relatively simple changes in Hox genes control limb formation in tetrapods.
Disorders and Diseases of the Endocrine System Disorders and Diseases of the Endocrine System
Hormonal control over male and female reproductive hormones. Hormonal control over male and female reproductive hormones.
Laparoscopy. A laparoscope is used to view reproductive organs. Laparoscopy. A laparoscope is used to view reproductive organs.
Control of Respiration Control of Respiration
Video: Gastrin (protein digestion)

For a complete list of videos, visit our video library