« previous next »
« previous next »
 

Did you know?

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

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Urinary System Urinary System
Relationship of the conduction system to an ECG strip. Relationship of the conduction system to an ECG strip.
The dorsal-column medial-lemniscus system. The pathways from only one side of the body are shown. The dorsal-column medial-lemniscus system. The pathways from only one side of the body are shown.
The urinary system The urinary system
Muscular system Muscular system
Respiratory system of a bird. Respiratory system of a bird.
Video: How to find out if a population is evolving?

For a complete list of videos, visit our video library