Which of the following is not an accessory digestive gland?

A. Liver
B. Submandibular gland
C. Pancreas
D. Frenulum

Look each term up at http://www.google.com and let us know what you decide.

B: Submandibular Gland

To determine which of the following is not an accessory digestive gland, we need to understand the function of each of these glands and their involvement in the process of digestion.

A. Liver: The liver is the largest gland in the body and plays a crucial role in digestion. It produces bile, which helps in the breakdown and absorption of fats.

B. Submandibular gland: The submandibular gland is one of the salivary glands located beneath the mandible, or jawbone. It secretes saliva, which contains enzymes that initiate the digestion of carbohydrates.

C. Pancreas: The pancreas is an accessory digestive gland that produces digestive enzymes, such as pancreatic amylase, lipase, and proteases, which are essential for the digestion of carbohydrates, fats, and proteins.

D. Frenulum: The frenulum is not a digestive gland. It is a small fold of tissue in the mouth that connects the tongue to the floor of the mouth. It does not secrete any digestive enzymes or play a role in digestion.

Therefore, the correct answer is D. Frenulum.