Did you know?
During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
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Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.
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Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
Feeding groove and phagocytosis displayed by many species of supergroup Excavata.
Speckled wood aegeria sub-species, Algendar gorge, Minorca
Human eye anatomy
Human Cell
Karl Marx (1818–1883) believed that the roots of human misery lay in class conflict, the ...
Four Butterflies, Two Species