MICROANATOMY

Detailed explanation-1: -All lymph passes through at least one lymph node, where this potentially harmful foreign matter is mechanically sieved and neutralized by dendritic cells, macrophages and the T and B cells of the body’s immune system.

Detailed explanation-2: -Fluid that is forced out of the bloodstream during normal circulation is filtered through lymph nodes to remove bacteria, abnormal cells and other matter. This fluid is then transported back into the bloodstream via the lymph vessels. Lymph only moves in one direction, toward the heart.

Detailed explanation-3: -Lymphatic vessels collect and filter lymph (at the nodes) as it continues to move toward larger vessels called collecting ducts. These vessels operate very much like your veins do: They work under very low pressure, have a series of valves in them to keep the fluid moving in one direction.

Detailed explanation-4: -Answer and Explanation: The correct answer is (b): Lymph flows through sinuses in a slow manner. The lymph fluid enters a lymph node through afferent lymphatic vessels and moves through the subcapsular sinus. From there, it enters and meanders through a number of small sinuses.