science How Do Kidneys Work? Kidney is an essential part of body.It helps to expel nitrogenous waste products from the body. It controls blood pressure and retains the water and acid-base balance of the blood. Sheikh Sajjad Hello,This is Sajjad from Bangladesh.I am working for human rights and development.Interested in travelling,gain knowledge and help people. More posts by Sheikh Sajjad. Sheikh Sajjad 8 Jul 2020 • 3 min read Subscribe to Utopia Educators Get the latest posts delivered right to your inbox Subscribe Great! Check your inbox and click the link to confirm your subscription. Please enter a valid email address!