« previous next »
« previous next »
 

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.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Temperature and Color Temperature and Color
How to use Cramer's rule to solve a second-order determinant (Question 1) How to use Cramer's rule to solve a second-order determinant (Question 1)
Economics question Economics question
economic question economic question
economic question (having trouble) economic question (having trouble)
Question about Resultant of gravitational force? Question about Resultant of gravitational force?
Video: Helper T cell receptors, activation, proliferation, differentiation & action

For a complete list of videos, visit our video library