Which organs are part of the digestive system?

The liver, gallbladder, and stomach are integral components of the digestive system, which is responsible for processing food and absorbing nutrients. The liver plays a key role in detoxifying substances and producing bile, which is essential for digesting fats. The gallbladder stores and releases bile produced by the liver into the small intestine to aid in digestion. The stomach is a muscular organ that not only breaks down food through mechanical means but also secretes digestive acids and enzymes that continue the chemical digestion of food into a semi-liquid form.

In contrast, the heart, lungs, and kidneys are part of the circulatory and excretory systems rather than the digestive system. The pancreas produces enzymes for digestion and has functions related to blood sugar regulation, but it does not appear in the correct option alongside lungs and intestines, which also serve different physiological roles. The brain and spine are components of the nervous system, primarily responsible for control and coordination, while the throat is part of the respiratory and digestive pathways but is not a major organ of digestion itself.