Crystals were mainly located in the ciliary body stroma and appeared in the pigmented epithelium of the processes from 11 mo. We could not unambiguously find crystals in the nonpigmented epithelium.

We don’t know much about the regulation of endocytosis and cell-to-cell transport in the muco-ciliary epithelium of the upper respiratory tract. Viruses, on the other hand, know all about it. We use ...