« previous next »
« previous next »
 

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

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.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

X chromosome inactivation in female mammals produces the Barr Body. X chromosome inactivation in female mammals produces the Barr Body.
Examples of animals with external gills. Examples of animals with external gills.
Female reproductive structure and function in humans. Female reproductive structure and function in humans.
Structures of the external ear, middle ear, and inner ear Structures of the external ear, middle ear, and inner ear
Male and female philopatry. Male and female philopatry.
Video: Elementary kinetics

For a complete list of videos, visit our video library