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Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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The average adult has about 21 square feet of skin.

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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.

Leukemia. A blood smear from a patient suffering from leukemia demonstrates the abundance of enlarge Leukemia. A blood smear from a patient suffering from leukemia demonstrates the abundance of enlarge
Map of Mars Locations Map of Mars Locations
A mother dies, a father loses his leg—such calamities shattered poor urban families. Orphaned street A mother dies, a father loses his leg—such calamities shattered poor urban families. Orphaned street
This illustration shows the decibel level in various locations and associated with different ... This illustration shows the decibel level in various locations and associated with different ...
(B) Locations of major arteries. (B) Locations of major arteries.
Centromere locations and the chromosome designations that are based on them Centromere locations and the chromosome designations that are based on them
Video: Contraction cycle of a sarcomere

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