Cytoplasmic dense bodies in pig pinealocyte during postnatal development. Quantitative, ultrastructural study.

Cytoplasmic dense bodies, conspicuous structures of pinealocytes in the pig pineal gland were ultrastructurally examined during postnatal development from the first day after birth to puberty. The morphometric analysis was employed to estimate the quantitative changes. Process of progressive increase in the relative volume with simulatenous differentiation of structure of the bodies was observed.