[Trachea, monkey; x-section, PTS]. The lumen of the trachea is lined by pseudostratified columnar epithelium. Note that all the surface cells have cilia at their free (apical) surface.(What function do these cilia serve in the trachea?) Mucus-secreting unicellular gland cells (goblet cells) are interspersed among the ciliated cells.Trachea, monkey; x-section, PTS]. The lumen of the trachea is lined by pseudostratified columnar epithelium. Note that all the surface cells have cilia at their free (apical) surface.
Complex Carbs on Restrictive Low-Carb Diets. If you're on a restrictive low-carb diet, you may be limited to just 20 grams of net carbs per day. That excludes virtually any food rich in complex carbohydrates, as a single serving of any of the previously mentioned foods contains more than your daily limit.
Carbohydrates. The amount of carbohydrates you should consume is based on your calories. According to the USDA's Dietary Reference Intakes, carbohydrates should comprise 45 to 60 percent of your calories. If you consume 2,000 calories per day, 900 to 1,300 of them should come from carbohydrates. Since carbohydrates contain 4 calories per gram, this equals 225 to 325 grams of carbohydrates per day.