Lymph capillaries are thin-walled, blind- ending vessels in between cells of body tissue. These collect tissue fluid that has been forced out of blood capillaries and has not returned to them. They are drainage vessels and their walls are made of a single layer overlapping endothelial cells which makes them permeable. Filaments anchor the endothelial cells to surrounding structures so when the tissue swell with fluid the endothelial cells of the lymph capillary wall are slightly pulled apart. This results in the tissue fluid between cells and protein to enter the lymph capillaries. The lymph capillaries push on the endothelial cells when they are full of fluid and they shut the gaps between them so the fluid cannot leak again.
The lymphatic …show more content…
The epidermis of the skin, mucous membranes, bone marrow and central nervous system are free of the lymphatic capillaries whereas regions like the lungs, gut, genitourinary system and dermis of the skin are significantly packed with these vessels. The lymph drains into larger vessels called the lymphatics. These converge to form one of two vessels called lymphatic trunks. One is the right lymphatic duct which drains the upper right portion of the body and returns the lymph to the bloodstream via the right subclavian vein. The other trunk is called the thoracic duct and drains the remaining part of the fluid into the left subclavian vein. The lymph is transported along the system of vessels by muscle contractions and the valves prevent the lymph from flowing backward. The vessels are punctuated at small intervals which are called lymph nodes and these remove foreign materials like infectious microorganisms from the lymph filtering through …show more content…
Lymph is similar to the plasma found in the veins. It is a mixture of 90% of water and 10% of solutes like proteins, cellular waste products, dissolved gases and hormones. It may contain bacterial cells that are picked up from infected tissues and the leucocytes fight the pathogens. The lymphatic vessels contain subclavian veins that are located on the sides of the neck allowing the lymph fluid to enter the circulatory system. Lymph is made when the interstitial fluid is collected. When an artery reaches the tissues it branches into arterioles and then into a capillary network. These link up with venules to carry blood back to the veins. At the arterial end of the capillary the blood is under high hydrostatic pressure which will push the fluid out of the capillaries. These will leave the capillary wall through gaps. Not all the fluid returns to the blood capillaries. Some enter the lymphatic system which start in the tissues and drain the excess fluid into larger vessels that will eventually rejoin the blood system in the chest cavity. The lymph has less oxygen and few nutrients and contain more carbon dioxide and wastes. It also contain lymphocytes to help filer any
The lymphatic …show more content…
The epidermis of the skin, mucous membranes, bone marrow and central nervous system are free of the lymphatic capillaries whereas regions like the lungs, gut, genitourinary system and dermis of the skin are significantly packed with these vessels. The lymph drains into larger vessels called the lymphatics. These converge to form one of two vessels called lymphatic trunks. One is the right lymphatic duct which drains the upper right portion of the body and returns the lymph to the bloodstream via the right subclavian vein. The other trunk is called the thoracic duct and drains the remaining part of the fluid into the left subclavian vein. The lymph is transported along the system of vessels by muscle contractions and the valves prevent the lymph from flowing backward. The vessels are punctuated at small intervals which are called lymph nodes and these remove foreign materials like infectious microorganisms from the lymph filtering through …show more content…
Lymph is similar to the plasma found in the veins. It is a mixture of 90% of water and 10% of solutes like proteins, cellular waste products, dissolved gases and hormones. It may contain bacterial cells that are picked up from infected tissues and the leucocytes fight the pathogens. The lymphatic vessels contain subclavian veins that are located on the sides of the neck allowing the lymph fluid to enter the circulatory system. Lymph is made when the interstitial fluid is collected. When an artery reaches the tissues it branches into arterioles and then into a capillary network. These link up with venules to carry blood back to the veins. At the arterial end of the capillary the blood is under high hydrostatic pressure which will push the fluid out of the capillaries. These will leave the capillary wall through gaps. Not all the fluid returns to the blood capillaries. Some enter the lymphatic system which start in the tissues and drain the excess fluid into larger vessels that will eventually rejoin the blood system in the chest cavity. The lymph has less oxygen and few nutrients and contain more carbon dioxide and wastes. It also contain lymphocytes to help filer any