Lymphatic vessels are a network of thin-walled tubes that are part of the lymphatic system, which is a complex network of tissues and organs that helps maintain fluid balance in the body and fights infections. The lymphatic vessels carry a fluid called lymph, which is a clear, colorless liquid that contains white blood cells, proteins, and other substances.
The lymphatic vessels begin as tiny capillaries that are found in most tissues of the body. These capillaries merge together to form larger vessels, which eventually drain into two main lymphatic ducts, the thoracic duct and the right lymphatic duct. The thoracic duct drains lymph from most of the body, while the right lymphatic duct drains lymph from the upper right side of the body, including the right arm, right side of the head, and right thorax.
The lymphatic vessels also have small, bean-shaped structures called lymph nodes along their path. These nodes act as filters for the lymph, trapping bacteria, viruses, and other harmful substances, and activating immune cells to help fight infections.
Further Reading:
Learn How the Lymphatic System Works and How to Keep It in Balance