Lymphatic capillaries (vasa lymphocapilldria) are the initial link - the "roots" of the lymphatic system. They are present in all organs and tissues of the human body, except the brain and spinal cord, their membranes, the eyeball, the inner ear, the epithelial cover of the skin and mucous membranes, cartilage, spleen parenchyma, bone marrow and placenta.
