Steps. 1  1. Purchase Tincture of Iodine. Iodine is available at most drug stores in the first aid section. Buy an iodine solution with 2% iodine. 2  2. Wash and dry the affected areas. Use antibacterial soap and warm water to cleanse the ringworm site. 3  3. Apply the tincture of iodine. Iodine comes in a small glass or plastic bottle.
Excretion is important for living things because a build up of the waste products from these chemical reactions is very dangerous for the body because it can, in excess, be poisonous. Be careful though, faeces is NOT excretion.
Blood is important to the excretory system. It carries waste from cells through the bloodstream to the excretory organs for removal from the body.The excretory system consists of many parts and organs that work as a whole. It rids the body of metabolic waste, which contains salts, carbon dioxide and urea.