MICROANATOMY

Detailed explanation-1: -The jugulodigastric lymph nodes are found in the proximity of where the posterior belly of the digastric muscle crosses the internal jugular vein. Nodes are typically around 15 mm in length in adults, and decrease in size during old age.

Detailed explanation-2: -Notable territories of the body that do not appear to contain lymphatics include the bone marrow, epidermis, as well as other tissues where blood vessels are absent. The central nervous system was long considered to be absent of lymphatic vessels until they were recently identified in the cranial meninges.

Detailed explanation-3: -After collecting in the cisterna chyli, lymph flows proximally through the thoracic duct, and ultimately empties in the venous circulation at the junction of the left internal jugular and subclavian veins.