lymph nodes
The lymphatic capillaries are made up of endothelial cells, which are thin-walled cells that line the inside of the vessels. These cells have small openings that allow fluid and molecules to enter the capillaries.
lymph
Tissue fluid is returned to circulation through the lymphatic system, where it is collected in lymph capillaries and transported back to the bloodstream through lymphatic vessels.
Lymphatic vessels originate as blind-ended capillaries in the tissue spaces. These capillaries merge to form larger vessels that eventually join the lymphatic ducts, which return lymph fluid back to the bloodstream.
The capillaries are the starting point of the one-way lymphatic system. Lymph capillaries originate in tissues and drain any excess tissue fluid that has not been reabsorbed into the bloodstream and move it into lymph veins. This prevents swelling or edema (collection of fluid in the tissues).
because the amount of fluid that get out from capillaries are low,,,,as we know the lymphatic vessels drain the excess amount of fluid that gets out from capillaries,,,so in bone marrow there is no high amount of fluid so there is no need to have lymphatic drainage :))
The sequence of fluid flow is blood capillaries.... interstitial space or interstitial fluid..... lymphatic capillaries.... lymphatic vessels.... lymphatic ducts..... junction of the internal jugular and subclavian veins. Then what helps this whole sequence is the skeletal muscle pump and the respiratory pump.
Lymphatic system
The lymphatic capillaries are small, thin-walled vessels that collect excess tissue fluid (lymph) from the interstitial spaces and return it to the bloodstream. This helps maintain fluid balance in the body and plays a crucial role in the immune system by transporting immune cells and proteins.
While surrounding tissues it is called interstitial fluid. Once it enters the lymphatic system it is called lymphatic fluid.
The fluids in the blood leak through the capillaries and into the surrounding tissue. After the cells are bathed the fluid moves into the the lymphatic system. It is then returned into the bloodstream
The formation of tissue fluid at the capillaries is primarily influenced by hydrostatic pressure and osmotic pressure. Hydrostatic pressure from the blood pushes fluid out of the capillaries into the surrounding tissues, while osmotic pressure, generated by proteins in the blood, draws fluid back into the capillaries. The balance between these opposing forces, along with factors such as capillary permeability and the presence of lymphatic drainage, determines the overall movement of fluid. Consequently, any changes in these factors can affect the volume and composition of tissue fluid.