The nephron (from Greek Î½ÎµÏÏÏÏ - nephros, meaning kidney) is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine. nephron eliminates wastes from the body, regulates blood volume and blood pressure, controls levels of electrolytes and metabolites, and regulates blood pH.
Most people use a Leg Curl Machine at the gym to work out their hamstrings, but all you need are some ankle weights or a set of resistance bands. Wrap the weights or bands around your ankles, and, keeping your upper leg immobile, bend your knees and try to touch your butt with your heels.
DR HASAN : The best doctor to see for hamstring injuries is an orthopedic specialist. If physical therapy is planned then a consultation from physical therapist is also required but primarily this has to be managed by an orthopedic specialist. I have answered your primary concern but i am here to ask anything else you want.