« previous next »
« previous next »
 

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

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.

Apollo Belvedere (detail), Roman copy after a 4th-century BCE Greek original. Apollo Belvedere (detail), Roman copy after a 4th-century BCE Greek original.
Testing for Occult Blood Testing for Occult Blood
Predicted Temperature Trends Through the 21st Century Predicted Temperature Trends Through the 21st Century
Testing for the bulge sign Testing for the bulge sign
Testing muscle strength - Temporalis muscles Testing muscle strength - Temporalis muscles
Testing the triceps reflex Testing the triceps reflex
Video: Bulk flow - factors that influence bulk flow

For a complete list of videos, visit our video library