Which organ secretes bile and neutralizes ammonia from the circulatory system?

The liver is the organ responsible for secreting bile and neutralizing ammonia from the circulatory system. Bile, which is produced by the liver, plays a crucial role in the digestion and absorption of fats in the small intestine. Additionally, the liver is vital for processing various substances in the body, including the detoxification of ammonia, which is a byproduct of protein metabolism. The liver converts ammonia into urea, which is then excreted from the body through urine.

The gallbladder, while involved in the storage and release of bile, does not produce bile itself and is not responsible for ammonia neutralization. The pancreas contributes to digestion by producing enzymes and hormones but is not involved in bile secretion or ammonia detoxification. The stomach primarily focuses on the digestion of food and does not play a role in bile secretion or ammonia processing. Therefore, the liver is uniquely positioned to perform both essential functions highlighted in the question.