1.Skin:provides protection from mechanical impacts and pressure, variations in temperature, micro-organisms, radiation and chemicals.
2.Lungs: converts deoxygenated blood to oxygenated blood.
3.Liver: converts dangerous wastes into urea.
4.Kidney: filters the blood before sending it back to the heart and also produces urine.
5.Ureter: transport urine from kidneys to the bladder.
6.Bladder:stores urine.
7.Urethra:carries urine from bladder to outside the body.