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Mewn anatomeg ddynol, y system endocrinaidd sy'n canitatáu cyfathrebu rhwng gwahanol rannau o'r corff drwy gyfrwng hormonau wedi'u cynhyrchu yn y chwarennau endocrin megis yr hypothalamws, y chwarren bitwidol ('pituitary gland'), y corffyn pineol, y thyroid, y chwarennau parathyroid a'r y chwarennau adrenal.
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