|
|
The human body produces and destroys 15 million blood cells every second.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
![Gate Control Theory, Gate control, Open gate, Closed gate, Pain, Nerve transmission of pain, Pain ma](https://biology-forums.com/gallery/47/medium_18099_24_09_12_10_46_18.jpeg)
![A typical pedestal grinder with a wire wheel on the left side and a stone wheel on the right side. ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_2_44_55_29461604.png)
![Operation of a typical pulse generator (pickup coil). At the bottom is a line drawing of a typical ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_6_25_26_29803749.png)