Fig. 3From: Toxicological evaluations of betulinic acid and ursolic acid; common constituents of Houttuynia cordata used as an anthelmintic by the Naga tribes in North-east IndiaSpleen histological sections of rats in sub-acute toxicity study. a Normal control group; b 10 mg/kg BA-treated group; c 10 mg/kg UA-treated group; d 50 mg/kg APAP-treated group (× 25, H&E stained). WP—white pulp, RP—red pulp, SS—splenic septa, CA—central artery, V—vacuolizationBack to article page