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).
Iron deficiency (Anemia). Anemia or iron deficiency may also be an underlying cause of cracked nails. Iron helps the body in producing hemoglobin, the oxygen carrying part of RBCs. A deficiency of iron can lead to cracked nails for the blood oxygen does not completely reach the nail bed.enerally, maximum non-medical causes of cracked nails are associated with over exposure of nail to harmful chemicals and water. This leads the nail to lose the moisture barrier and natural oils. Many times, low humidity levels in winters plays an imperative role in robbing the essential moisture from nails.