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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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
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Cyanide works by making the human body unable to use oxygen.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
A Splash of Color in a Frozen World of White
Hypothyroidism. Hyposecretion of the thyroid gland produces the symptoms that are illustrated.
Speciation produces new types of organisms
Biology Test Questions
8.The following table contains DNA-sequence information compiled by Marilyn Kozak (1987). The ...