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).
Brittle Toenails. Brittle toenails can be caused by thyroid problems, iron deficiency, circulation problems, biotin deficiency, and impaired kidney function. Toenails that fray or split may be the result of a deficiency in protein, Vitamin C, and/or folic acid, or occur in those who suffer from psoriasis.ertical Grooves On Your Toenails. Vertical grooves can be the result of aging, iron deficiency, and kidney disorders. Rheumatoid arthritis can cause your nails to bead. Toenails that look like hammered brass can indicate hair loss. If the beds of your toenails are small and short, this can indicate heart disease.