« previous next »
« previous next »
 

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Laparoscopy. A lighted endoscope specialized for insertion into the abdomen, called a laparoscope, i Laparoscopy. A lighted endoscope specialized for insertion into the abdomen, called a laparoscope, i
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Endocrine and nervous control of blood pressure. Endocrine and nervous control of blood pressure.
Control of lipolysis in adipose cells by a cAMP-mediated cascade system Control of lipolysis in adipose cells by a cAMP-mediated cascade system
Biological control pits one organism against another Biological control pits one organism against another
Control of flower formation, as revealed by mutations in Arabidopsis thaliana. Control of flower formation, as revealed by mutations in Arabidopsis thaliana.
Video: Morphology of a tomato plant

For a complete list of videos, visit our video library