« previous next »
« previous next »
 

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Plant cells expand by taking up water into their vacuoles. Plant cells expand by taking up water into their vacuoles.
Water chain in cytochrome f Water chain in cytochrome f
water movement water movement
A complete cranium of Australopithecus afarensis from Hadar, Ethiopia. A complete cranium of Australopithecus afarensis from Hadar, Ethiopia.
The remarkably complete skull of a 3-year-old Australopithecus girl; the fossil is 3.3 million ... The remarkably complete skull of a 3-year-old Australopithecus girl; the fossil is 3.3 million ...
Nutrients Are Transported through the Circulatory and Lymphatic Systems Water-soluble nutrients Nutrients Are Transported through the Circulatory and Lymphatic Systems Water-soluble nutrients
Video: Nucleic acid digestion - brush border enzymes, end products & transport mechanism

For a complete list of videos, visit our video library