Reference
Anatomy Glossary
A searchable, plain-language glossary of the anatomy and physiology terms used across BodySecretsHub.
Anatomy Glossary
Anatomy
The study of the structure of the body and its parts.
Physiology
The study of how the body and its parts work.
Cell
The smallest living unit of the body.
Tissue
A group of similar cells working together.
Organ
A structure made of tissues that performs a job.
Artery
A vessel carrying blood away from the heart.
Vein
A vessel carrying blood back to the heart.
Capillary
The tiniest blood vessel, for exchange with cells.
Neuron
A nerve cell that carries signals.
Hormone
A chemical messenger carried in the blood.
Enzyme
A protein that speeds up chemical reactions in the body.
Metabolism
All the chemical reactions that keep the body alive.
Homeostasis
Keeping the body's internal conditions stable.
Antibody
A protein the immune system uses to target germs.
Alveolus
A tiny air sac in the lungs for gas exchange.
Nephron
The filtering unit of the kidney.
Tendon
Tissue attaching muscle to bone.
Ligament
Tissue attaching bone to bone.
Cartilage
Flexible tissue that cushions joints.
Marrow
Tissue inside bones that makes blood cells.
Plasma
The liquid part of blood.
Diaphragm
The main muscle of breathing.
Cornea
The clear front layer of the eye.
Retina
The light-sensing layer at the back of the eye.
Cochlea
The spiral organ of hearing in the inner ear.
Villi
Folds in the small intestine that absorb nutrients.
Synapse
The gap where one neuron signals another.
Gland
An organ that makes and releases substances.
Ligament
Tough band joining bone to bone.
Vertebra
One of the bones of the spine.
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This tool is for education and general interest only. It is not a medical device and must not be used to diagnose, treat or make health decisions. Always consult a qualified professional.
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Plain-language definitions
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