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Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
![Plate XLVII of Animalia Qvadrvpedia et Reptilia (Terra) by Joris Hoefnagel, circa 1575, showing a &q](https://biology-forums.com/gallery/47/medium_27581_22_04_12_4_45_01.jpeg)
![An accessory belt tensioner. Most tensioners have a mark that indicates normal operating location. ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_15_47_296731831.png)