Fig. 10

Effect of n-hexane leaf extract of Ipomoea batatas L. on the heart. Pic (1) represents control rat heart composed of: A—bundles of myocardial fibres, B—coronary vessel and C—interstitial space, (2) phenylhydrazine alone showed; A—dilated coronary vessel with B—mild vascular congestion, (3) at 5 mg/kg of ferrous (iii) hydroxide showed; A—dilated coronary vessel, B—mild vascular congestion and C—heavy infiltrates of inflammatory cells, (4) at 125 mg/kg n-hexane extract showed A—moderate vascular congestion (5) at 250 mg/kg n-hexane extract showed A—normal my cardiac fibres and B—normal coronary vessel (6) at 500 mg/kg n-hexane extract showed A—moderate vascular dilation and B—mild congestion. They were using haematoxylin–eosin dye with X 40 magnification