by use of the electron microscope , hrp was found in electron-dense bodies , probably lysosomes , in the endothelial cells and perivascular macrophages 4 h after intraperitoneal injection , the supporting cells and intrapineal or luminal macrophages 8 h after injection , and the receptor cells 24 h after injection of the tracer .
C0024369
lysosomes
C0007634
the