« previous next »
« previous next »
 

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

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

Did you know?

Your heart beats over 36 million times a year.

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?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

tree-ring data tree-ring data
Basbaum and Fields’s (1978) model of the descending analgesia circuit. Basbaum and Fields’s (1978) model of the descending analgesia circuit.
Remove cold source, and check the knee for changes. Notice skin color and changes in swelling around ... Remove cold source, and check the knee for changes. Notice skin color and changes in swelling around ...
How to calculate the mean for grouped data How to calculate the mean for grouped data
A reverse-biased silicon diode is connected in series with a 12 V source and a resistor.The ... A reverse-biased silicon diode is connected in series with a 12 V source and a resistor.The ...
Find the curved line Find the curved line
Video: Cardiac Cycle (Part 1 of 4)

For a complete list of videos, visit our video library