Following have no lymphatics except (LQ)
1. Lymphatic capillaries are absent in the central nervous system, the meninges, the eyeball (except the conjunctiva), the orbit, the internal ear, within striated muscle, the bone marrow, the liver lobule, the spleen pulp and kidney parenchyma. They are entirely absent in cartilage.
2. The lymphatic fluid is transported to progressively larger lymphatic vessels culminating in the right lymphatic duct (for lymph from the right upper body) and the thoracic duct (for the rest of the body); these ducts drain into the circulatory system at the right and left subclavian veins.
3. The bone marrow & thymus are the primary lymph organs
4. Spleen, lymph nodes, Peyer’s patches, tonsils, vermiform appendix, and red bone marrow are accessory/secondary lymphoid tissues.