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).
Causes of Brittle nails (Split nails): See detailed list of causes below. Brittle nails (medical symptom): thinning of the nail plate. The list of medical condition causes of Brittle nails (Split nails) includes: 1  Severe illness.  Psoriasis.