it is called Endothelium (endothelial layer) composed of simple squamous epithelium forming a countinuous barrier.
Tunica Intima is the innermost layer of the wall of the artery. The wall is consist of simple squamous epithelium which is called endothelium.
Lymphatic Filariasis
Lymph capillaries
The innermost layer of epithelial cells of a blood vessel is called endothelium.
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.
simple squamous epithelium
These are usually simple squamous epithelial cells. The epithelium lining the body cavities is called the mesothelium and is where the cancer mesothelioma arises from. The epithelium lining arteries and veins is called endothelium.
While surrounding tissues it is called interstitial fluid. Once it enters the lymphatic system it is called lymphatic fluid.
lymphangitis answered by mouli
The network of vessels that returns fluid to the bloodstream is called the Lymphatic System.
The structure you described is likely a simple squamous epithelium folded onto itself, forming a double layer called a simple squamous epithelial membrane. This type of structure is commonly found in tissues where substances need to diffuse easily, such as in the lining of blood vessels or alveoli in the lungs.
They are called lacteals.