Source:http://linkedlifedata.com/resource/umls/id/C0016184
MSH: Agents employed in the preparation of histologic or pathologic specimens for the purpose of maintaining the existing form and structure of all of the constituent elements. Great numbers of different agents are used; some are also decalcifying and hardening agents. They must quickly kill and coagulate living tissue.,UMD: Reagents used for coagulation and/or precipitation of protoplasmatic substances (i.e., fixation), making them resistant to further changes either from the reagents to which they are subjected or from autolysis and putrefaction before microscopic sections can be prepared. Several substances are used as fixatives, including formaldehyde, mercury chloride, and glutaraldehyde solutions; some include decalcifier additives.,NCI: A compound that fixes tissues and cells for microscopic study.