HealthVetted · Human Body
Anatomy Explorer
Clinician-reviewed, plain-English guides to every body system — how each works, its major organs, and the health concerns it touches. Free educational reference, no sign-up.
skeletal
The Skeletal System
The framework of bones, cartilage, and connective tissue that supports the body, protects organs, and anchors muscles for movement. Bones also store minerals and house the marrow that produces blood cells.
nervous
The Nervous System
The body's communication and control network, built from the brain, spinal cord, and a web of nerves. It gathers sensory information, processes it, and directs movement, thought, mood, and the automatic functions that keep the body running.
digestive
The Digestive System
The tract and accessory organs that break food into absorbable nutrients and eliminate waste. Mechanical and chemical processing along the way extracts energy, vitamins, and minerals that fuel every other system.
respiratory
The Respiratory System
The network of airways and lungs that brings oxygen into the body and removes carbon dioxide. Air is warmed, filtered, and humidified on its way to the alveoli, where gas is exchanged with the bloodstream.
integumentary
The Integumentary System
The body's outer covering, made up of skin, hair, nails, and associated glands. It forms a protective barrier against pathogens and water loss, regulates temperature, and houses the sensory receptors that detect touch, pressure, and pain.
cardiovascular
Cardiovascular System
The heart, blood and vessels that circulate oxygen and nutrients throughout the body.
endocrine
Endocrine System
Glands and hormones that regulate metabolism, growth, mood and reproduction.