The digestive tract of cells.
D002463:Cell Membrane Permeability; D008247:Lysosomes / Q000201:enzymology; D008264:Macrophages / Q000166:cytology / Q000201:enzymology / Q000502:physiology; D008854:Microscopy, Electron; D009504:Neutrophils / Q000166:cytology / Q000201:enzymology / Q000502:physiology; D010587:Phagocytosis; D010873:Pinocytosis