Structure diagram of BSA, CS, gel scaffold and albino mouse lung. A Reaction scheme to show a preparation of CMs embedded CMC-OCS composite gel scaffold (CMs/gel). Reproduced with permission from Ref. [154]. Copyright 2017, Elsevier. B Ribbon representation of BSA structure. Reproduced with permission from Ref. [160]. Copyright 2016, Elsevier. C CS. Reproduced with permission from Ref. [154]. Copyright 2017, Elsevier. D Cytoarchitecture of albino mice lung (azithromycin solution). Reproduced with permission from Ref. [163]. Copyright 2016, Springer.