vitellogenesis in locusta migratoria is studied by electron microscopy , and may be divided into two major periods : a. the first stage of growth ( oocyte length from 0,8 mm to 1,8 mm ) is characterized by protein synthesis and storage in the rer , by transfer of material of nucleolar origin into the oocyte perinuclear cytoplasm as well as by pinocytotic activity giving rise to granulo-membranous structures .
C0230779
rer
C0010834
cytoplasm