Remember the biology class you had in high school? Well, even if you do, lots of new knowledge about how the body works helps us to understand it now better than ever. Body Basics is a collection of articles for parents that explain just how each body system, part, and process is necessary for living. Use this medical library to learn more about how the body works, what basic human anatomy is, and what happens when parts of the body don't function properly. Blood Bones, Muscles, and Joints Brain and Nervous System Digestive System Endocrine System Eyes Female Reproductive System Heart and Circulatory System Immune System Kidneys and Urinary Tract Lungs and Respiratory System Male Reproductive System Metabolism Mouth and Teeth Skin, Hair, and Nails Spleen and Lymphatic System Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.