transport of the epididymal contents was studied in vitro by filming , for 1-2.5 h , the movements of tiny , stained oil droplets injected through a micropipette into two regions of the lumen of the caput epididymidis : the most proximal part , with the widest outer diameter ( region i ) , and the neighbouring , narrowest portion ( region ii ) .
C0014533
epididymal
C0228023
caput epididymidis