Why do humans have a gallbladder?

Humans have a gallbladder to store and concentrate bile, a fluid that helps digest fats. Bile is produced in the liver and travels through the common bile duct to the gallbladder. When a person eats a meal, the gallbladder contracts and releases bile into the small intestine, where it helps break down fats.

Here are some additional details about the gallbladder and its functions:

* The gallbladder is a small, pear-shaped organ that is located on the underside of the liver.

* It has a capacity of about 50 milliliters (2 ounces) of bile.

* The gallbladder is lined with a layer of smooth muscle that helps it to contract and release bile.

* The gallbladder is controlled by hormones, such as cholecystokinin, which is released when a person eats a meal.

* In addition to storing and concentrating bile, the gallbladder also helps to regulate the flow of bile into the small intestine.

* If the gallbladder is removed, the liver will still produce bile, but it will not be stored or concentrated. This can lead to problems with digesting fats.

Overall, the gallbladder is an important organ that plays a vital role in the digestion of fats.