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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.
Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
![(A) The nine regions of the abdominopelvic cavity. (B) The four regions of the abdomen, which are re](https://biology-forums.com/gallery/47/medium_14755_20_09_12_5_58_20_8856490.jpeg)
![Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. (](https://biology-forums.com/gallery/47/medium_14755_24_09_12_7_41_29_8960395.jpeg)
![Reconnect all vacuum and air hoses and tubes. Replace any vacuum hoses that are brittle or swollen ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_42_37_29758653.png)