No, the gallbladder is not part of the endocrine system. The gallbladder is an organ that stores and concentrates bile, a digestive fluid produced by the liver. Its primary role is to release bile into the small intestine during the digestion of fats.
The endocrine system, on the other hand, is made up of glands that secrete hormones directly into the bloodstream. These hormones are responsible for regulating various bodily functions such as metabolism, growth, and mood.
While the gallbladder plays a crucial role in digestion, it does not produce or secrete hormones, which distinguishes it from endocrine organs like the pancreas, thyroid, and adrenal glands. Therefore, it is classified as part of the digestive system rather than the endocrine system.