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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.

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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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There are more sensory neurons in the tongue than in any other part of the body.

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Caregivers’ responses sometimes help a child with strong emotions adapt to the environment. Caregivers’ responses sometimes help a child with strong emotions adapt to the environment.
Preparing a Urine Specimen for Microscopic Examination (for Classroom Evaluation Only) Preparing a Urine Specimen for Microscopic Examination (for Classroom Evaluation Only)
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A question for grade 11 math A question for grade 11 math
Video: Nerve Impulse Transmission Animation

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