Complete each sentence by dragging the proper label into the appropriate blank. Not all terms will be used. The largest membrane of the body, the synovial membrane provides a protective barrier from environmental factors such as chemicals, water, microbes, and mechanical trauma. cutaneous membrane Consisting of an epithelium, a lamina propria, and muscularis mucosae, a lines serous fluid passageways of the body such as those of the digestive, respiratory, urinary, and reproductive tracts. lamina propria Consisting of simple squamous epithelium resting on a thin layer of areolar connective tissue, a lines the insides of some body cavities and produces a thin, watery secretion that serous membrane lubricates internal areas of movement. mucous membrane A serves as a wrapping around largely mobile joints and secretes synovial fluid that serves to lubricate joint movement. endothelium