three alveoli filled with fibrinous exudate, vintage engraving

alveoli anatomy ancient antique art artwork balsam biology black corrosive croupous disease disorder drawing engraved engraving eosin etching exudate fibrinous hematoxylin hepatization historic history human illustration lobar lobule lung medical old paraffin pathology picture pneumonia science serum single structure sublimate three vector vescile vesicular vintage wall white