👉 Membranous refers to a type of tissue that is composed primarily of cells and has a clear, transparent, or translucent appearance. It is one of the four main types of tissues in the human body, alongside muscle, bone, and fat. Membranes are the outermost layer of these tissues, covering the interior organs and providing them with structure and protection. They are found throughout the body, including the skin, blood vessels, mucous membranes, and respiratory tract.