What is Lymph?
Lymph is a vital component of the lymphatic system, originating from interstitial fluid found in the spaces surrounding cells. It plays a crucial role in carrying oxygen and nutrients to cells, as well as removing waste from them. As interstitial fluid enters the lymphatic system through lymph capillaries, it is transformed into lymph. Due to its origin, the composition of lymph is constantly changing. Interstitial fluid and blood continually exchange substances, which are then transported by lymph. One of its important functions is returning proteins and excess interstitial fluid back to the bloodstream, while also collecting bacteria for delivery to the lymph nodes.
The Structure of the Lymph Node Capsule
The lymph node capsule consists of dense irregular connective tissue and plain collagenous fibers. Within the nodes, connective tissues known as trabeculae divide the areas into compartments. As these trabeculae merge with the tissue connecting the node to the lymphatic vessels, they establish a framework for the node. Furthermore, this arrangement of connective tissue gives rise to the subcapsular sinus, also referred to as the lymph sinus or marginal sinus.