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Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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![(A) Lumbar puncture, also known as spinal tap; (B) section of the vertebral column showing the spina](https://biology-forums.com/gallery/47/medium_14755_07_10_12_3_22_05_93422479.jpeg)