MORPHOFUNCTIONAL CHANGES IN THE TAIL BONE GLAND OF DUCKS IN THE ANTENATAL PERIOD OF ONTOGENESIS
The results of studies on the tail bone gland growth and development and its histological and ultramicroscopic structure in the antenatal period of its development are submitted. It is shown that the above gland secretion starts at the 24th day of incubation. It is ascertained that the tail bone gland is a branched multilayer gland including the tertiary, secondary and primary tubes.