In vivo microscopy of internal organs.
D000715:Anatomy / Q000379:methods*; D000818:Animals; D001854:Bone Marrow Cells; D002610:Cheek; D008029:Lighting; D008099:Liver / Q000033:anatomy & histology; D008853:Microscopy / Q000379:methods*; D013154:Spleen / Q000033:anatomy & histology; D014184:Transplantation, Homologous