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Y Corff Dynol
Dy galon, dy ymennydd, dy esgyrn — y peiriant rhyfeddol yr wyt ti'n byw ynddo.
20 topics
Human brain
Heart
Lung
Skeleton
Immune system
DNA
Blood
Human eye
Ear
Muscle
Digestive system
Nervous system
Skin
Kidney
Liver
Neuron
Hormone
Vaccine
Cell (biology)
Chromosome