Physical education is a unique aspect of education in that it provides the only. instruction for students in the development and maintenance of positive attitudes, essential knowledge and physical skills. The contribution of physical education is to.
1 Kidney disease can cause a build-up of nitrogen waste products in the blood, which can damage nails. 2  Liver disease can damage nails.  Thyroid diseases such as hyperthyroidism or hypothyroidism may cause brittle nails or splitting of the nail bed from the nail plate (onycholysis).
The condition in which your nails split is known as onychoschizia, and this common problem can arise due to a variety of factors. One cause is malnutrition or a deficiency in vitamins or minerals, like iron. Your toenails can also split or become brittle due to trauma or repeated wetting and drying.