The extracts of Malus doumeria leaves were separated into 7 groups, i.e. waterextracted (A), petroleum etherextracted (B), ethanolextracted (C) divided on ethanol extracts by petroleum ether, HClextracted (D) and insoluble part in HCl divided on the group C by HCl, NaOHeatracted (E), ethyl acetateextracted (F) divided on the insoluble part in HCl by NaOH, and ethyl acetateextracted (G). The methods of weight of mice's immune organs, carbon clearance, enduring meager oxygen and enduring low and high temperature were used. The e...