小・中・高等学校の家庭科における系統的な食生活学習の教材開発--「食品ピラミッド」を用いた学習プログラムの研究

The cumulus and membrana granulosa of non-atretic ovarian follicles from primordial up to a stage shortly before ovulation were studied by electron microscopy. The follicular cells of primordial follicles were undifferentiated and rested on a thick basal lamina. In secondary follicles the endoplasmi... View More