« previous next »
« previous next »
 

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Theiler Staging Criteria for Mouse Embryo Development Theiler Staging Criteria for Mouse Embryo Development
Embryo and fetal development during weeks 1–25 of gestation. Embryo and fetal development during weeks 1–25 of gestation.
Loevinger's Stages of Ego Development Loevinger's Stages of Ego Development
Social Development Social Development
Economic and Social Development Economic and Social Development
Fetal development from 1 month to 9 months Fetal development from 1 month to 9 months
Video: Primary Active Transport - electrochemical gradient and ion transport / water movement

For a complete list of videos, visit our video library