The trachea connects the larynx and bronchi. It is lined with a mucus membrane with respiratory epithelium and a lamina propria, and a submucosa containing horseshoe shape hyaline cartilages and numerous mucus and mixed glands (Trachea 1).
Arrowroot starch and tapioca flour are two products that are used quite a bit in gluten-free cooking and baking. They are used to replace corn starch and wheat flour in various recipes. Arrowroot starch can sometimes substitute for tapioca flour depending on the application.
The resulting mixture is dried to a powder and purified by several washings. Arrowroot starch supplies no vitamins and contains only 0.2 percent protein. In cookery, it is used as a thickener in soups, sauces, puddings, and desserts. When boiled in water, it yields a transparent, odourless, pleasant-tasting jelly.