[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.
Many people find protein more satisfying ounce per ounce than carbohydrates, so you can easily eat more protein than you need to be healthy. The recommended daily amount is two or three (4-ounce) servings. For concentrated proteins like meat, a serving is the size of a computer mouse.any people find protein more satisfying ounce per ounce than carbohydrates, so you can easily eat more protein than you need to be healthy. The recommended daily amount is two or three (4-ounce) servings. For concentrated proteins like meat, a serving is the size of a computer mouse.