Exercise and the myocardial capillary-fiber ratio during growth.
D000367:Age Factors; D000704:Analysis of Variance; D000818:Animals; D002196:Capillaries / Q000033:anatomy & histology*; D003326:Coronary Circulation; D003331:Coronary Vessels / Q000254:growth & development*; D004699:Endocardium / Q000033:anatomy & histology; D006321:Heart / Q000033:anatomy & histology*; D008297:Male; D009206:Myocardium; D005082:Physical Exertion; D051381:Rats; D013550:Swimming