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Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

The stomach. Longitudinal view showing regions and internal structures. The stomach. Longitudinal view showing regions and internal structures.
Termination of norepinephrine activity through enzyme activity in the synapse. Termination of norepinephrine activity through enzyme activity in the synapse.
Stereospecificity conferred by an enzyme Stereospecificity conferred by an enzyme
A glutamate carboxyl group in the enzyme deprotonates N-1 of the pyrimidine A glutamate carboxyl group in the enzyme deprotonates N-1 of the pyrimidine
The Digestive System The Digestive System
Overview of the Digestive System Overview of the Digestive System
Video: Factors that influence muscle tension - Sarcomere length and force, understretched and overstretched

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