« previous next »
« previous next »
 

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

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.

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Rusty-tipped Page (Siproeta epaphus), Butterfly World (Florida) Rusty-tipped Page (Siproeta epaphus), Butterfly World (Florida)
Burial caves from Mangaia, Cook Islands, document the changing patterns of mortuary ritual. Burial caves from Mangaia, Cook Islands, document the changing patterns of mortuary ritual.
Workers at a Nike factory in Indonesia insert soles into sneakers for fourteen cents an hour. Workers at a Nike factory in Indonesia insert soles into sneakers for fourteen cents an hour.
Cross page from the Lindisfarne Gospels. Cross page from the Lindisfarne Gospels.
With the rocker arms contacting the base circle of the cam, insert a feeler gauge of the specified ... With the rocker arms contacting the base circle of the cam, insert a feeler gauge of the specified ...
Science Background Science Background
Video: Type of Cell Junctions - Desmosome, Hemidesmosomes and Gap Junctions

For a complete list of videos, visit our video library