The correct answer is C. Liver.
A gland is an organ that produces and releases one or more substances for use in the body. The thyroid gland produces hormones that regulate metabolism, growth, and development. Gastrine is a hormone that stimulates the production of gastric acid. The pancreas produces digestive enzymes and hormones that regulate blood sugar levels.
The liver is a large organ that performs many essential functions in the body, including:
- Metabolizing carbohydrates, fats, and proteins
- Producing bile, which helps to digest fats
- Storing vitamins and minerals
- Detoxifying the blood
- Regulating blood sugar levels
The liver is not a gland because it does not produce hormones or other substances that are released into the bloodstream.