these environmental parameters include a ) high cell density , b ) a unique extracellular matrix , c ) a semipermeable support between the basal plasma membrane of the cells and blood-derived nutrients in the interstitium , d ) chemically distinct microenvironments at the apical and basal surfaces of the cells , and e ) cell-to-cell interactions among sertoli cells and other testicular cell types .
C0007634
cells
C0699040
surfaces of