Shipbuilding is the construction of ships and other floating vessels. Endothelial cells are cells that line internal cavities including blood vessels and glands. They are often due to damage of blood vessels and connective tissue cells. Adipose tissue contains many small blood vessels. There are many cardiovascular diseases involving the blood vessels. There are other openings present for lymphatic vessels and nerves. The serosa contains blood vessels and lymphatics. It also surrounds the blood vessels and nerves. Inflammation of the lymphatic vessels is known as lymphangitis. Some cases may result from abnormalities in the lymphatic vessels. Passive targeting exploits the difference between tumor blood vessels and normal blood vessels. Nitric oxide results in vasodilation of blood vessels. It also results in dilation of the blood vessels in the lungs. Lymphangitis is the inflammation of the lymphatic vessels and channels. Abbasid sailors were also responsible for reintroducing large three masted merchant vessels to the Mediterranean.