« 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?

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.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Varicosis. (a) Varicose veins develop due to the failure of valves in the superficial veins of the l Varicosis. (a) Varicose veins develop due to the failure of valves in the superficial veins of the l
Crossing over during meiosis leads to allele combinations in sex cells that are not present in the p Crossing over during meiosis leads to allele combinations in sex cells that are not present in the p
This graphic illustrates the original systems model of politics advanced by David Easton. Politics This graphic illustrates the original systems model of politics advanced by David Easton. Politics
Toussaint L’Ouverture leads a revolt of slaves against the French in Haiti—the first and only major Toussaint L’Ouverture leads a revolt of slaves against the French in Haiti—the first and only major
Prolonged abuse leads to production of stress hormones that can lead to a cascade of effects ... Prolonged abuse leads to production of stress hormones that can lead to a cascade of effects ...
Connect the leads of the meter to contacts 30 and 87 of the relay socket. The reading of 4.7 ... Connect the leads of the meter to contacts 30 and 87 of the relay socket. The reading of 4.7 ...
Video: Mitosis step-by-step

For a complete list of videos, visit our video library