Transcytosis occurs in
In transcytosis, vesicles undergo Endocytosis on one side of a cell and then undergo exocytosis on the opposite side of the cell. Transcytosis is mostly seen in capillaries but also seen in M cells of intestine, osteoclasts,neurons (Ref: Ganong's Review of medical physiology)
M cells of intestine
Neuroglia
Pneumocytes
Axonlemma
General physiology