贝时璋,我国细胞学、胚胎学的奠基人之一,我国生物物理学的创始人.早年从事无脊椎动物的实验胚胎学和细胞学的研究,对细胞数恒定动物与再生的关系作了深入的研究.30年代发现了中间性丰年虫,并观察到其雌雄生殖细胞的相互转化现象,70年代提出细胞重建学说.重视交 Bei Shizhang, one of the founders of cytology and embryology in China, was the founder of our country’s biophysics.In the early years, he studied the experimental embryology and cytology of invertebrates and made a study on the relationship between the number of cells and the regeneration of animals In-depth study found in the 1930s, the middle-aged Pleurotus, and observed the male and female germ cells mutual transformation phenomenon, put forward the theory of cell reconstruction in the 1970s.