23. Digestive System

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

a. The crown of a tooth is surrounded by an outer layer of pulp, which is the hardest substance in the body.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

b. The filiform papillae of the tongue are keratinized, which makes them rough and able to assist in mechanical digestion.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

c. The three pairs of salivary glands are the parotid, submandibular, and sublingual glands.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

c. The soft palate and uvula move posteriorly during swallowing to prevent food from entering the laryngopharynx.