« previous next »
« previous next »
 

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Aortic valve. Aortic valve.
Origin and insertion of a muscle. Origin and insertion of a muscle.
The ring-tailed lemur is the best-known of the Madagascar primates. The ring-tailed lemur is the best-known of the Madagascar primates.
Badly burned exhaust valve. A compression test could have detected a problem, and a cylinder ... Badly burned exhaust valve. A compression test could have detected a problem, and a cylinder ...
Adjusting a valve takes both hands—one to hold the wrench to loosen and tighten the lock nut and ... Adjusting a valve takes both hands—one to hold the wrench to loosen and tighten the lock nut and ...
Model of how direct repeats generated during the insertion of a transposon or an insertion sequence Model of how direct repeats generated during the insertion of a transposon or an insertion sequence
Video: Secondary Active Transport

For a complete list of videos, visit our video library