Lymph enters a lymph node via an afferent vessel, and leaves via efferent vessels. Inside the lymph node, lymph percolates through various layers of tissue. The lymph then continues on its path into the blood circulatory system. Reticular Cells Reticular cells are found throughout the node and help trap antigens passing through; also, reticular cells [...]

What Is the Lymphatic System? Blood in the heart is highly pressurized, but most of that pressure is lost as blood flows through arteries and then arterioles. At the capillary level, most remaining pressure is lost as blood leaks out into tissues. This leaked fluid is unable to go against the pressure gradient back into [...]