If it remains in the tissue space, it will lead to a continual buildup, the process of swelling, the process of edema. And to prevent this from happening, our body uses lymph vessels, shown in green, to drain this fluid out of the interstitial space. Now, the fluid, which is now known as lymph, travels along these venues, along these vessels and eventually connects with these larger vessels we call lymph veins. And eventually the lymph veins reconnect with the blood vessels and the fluid is returned back into our blood circulation through the thoracic duct and the right lymphatic duct that bolt contains that bolt connects with special types of veins. So to see what we mean, let's take a look at the following diagram. So we have two important types of ducts the thoracic duct as well as our right lymphatic duct.