Morphological and functional changes in rat thyroid gland after a year following chronic exposure to low and intermediate doses of γ-radiation.

Introduction: Thyroid function depends on iodine uptake by the body as well as on exposure to various harmful environmental hazards (stress, ionizing radiation).

Aim: The aim of the work was to assess the effect of exposure to low and intermediate doses of external γ-radiation on the thyroid structure and function in young female rats at remote periods after radiation.

Materials And Methods: Forty female rats were used to study remote effects of external γ-radiation exposure during 20 d (at daily doses of 0.