How the body works
Explore by Body System
Browse health information organized by the body's major systems.
Brain & Nervous System
How the brain, spinal cord and nerves coordinate the body.
Explore →Heart & Circulatory System
The heart, blood vessels and circulation of blood.
Explore →Lungs & Respiratory System
Breathing, airways and oxygen exchange.
Explore →Digestive System
How food is broken down and nutrients absorbed.
Explore →Bones & Joints
The skeleton, joints and connective tissue.
Explore →Skin
The body's largest organ and its protective role.
Explore →Eyes
Vision, eye structure and eye health.
Explore →Ears, Nose & Throat
Hearing, smell, taste and the upper airway.
Explore →Kidneys & Urinary System
Filtration, fluid balance and waste removal.
Explore →Reproductive Health
Reproductive organs, hormones and related health.
Explore →Immune System
The body's defenses against infection and disease.
Explore →Endocrine System
Hormone-producing glands and metabolic balance.
Explore →HealthCareTastic provides educational information and is not a substitute for professional medical advice, diagnosis or treatment.