Our Body Basics articles explain how each body system, part, and process is necessary for living. Learn more about how the body works, what basic human anatomy is, and what happens when parts of the body don't work as well as they should.

• Blood
• Bones, Muscles, and Joints
• Central Nervous System: The Brain and Spinal Cord
• Digestive System
• Endocrine System
• Eyes
• Female Reproductive System
• Heart and Circulatory System
• Immune System
• Kidneys and Urinary Tract
• Lungs and Respiratory System
• The Lymphatic System
• Male Reproductive System
• Metabolism
• Mouth and Teeth
• Nervous System
• Peripheral Nervous System
• Skin, Hair, and Nails
• The Spleen