Which organs are involved in digestion, nutrient absorption, and metabolism?

Which organs are involved in digestion, nutrient absorption, and metabolism?

• A. Heart, body vessels
• B. Kidneys and bladder
• C. Stomach, intestines, and liver
• D. Skin and hair

Answer: (C)

Digesting food, absorbing nutrients, and using those nutrients in the body all rely on the stomach, intestines, and liver. The stomach starts digestion with acid and enzymes that break down food. The intestines do most of the digestion and are the main site where nutrients pass into the bloodstream. The liver processes these nutrients, regulates metabolism, stores energy, and produces bile to help digest fats. Other options don’t handle digestion or nutrient processing directly: the heart and blood vessels mainly transport substances, kidneys and bladder filter waste, and skin and hair aren’t involved in digestion or metabolism.

Digesting food, absorbing nutrients, and using those nutrients in the body all rely on the stomach, intestines, and liver. The stomach starts digestion with acid and enzymes that break down food. The intestines do most of the digestion and are the main site where nutrients pass into the bloodstream. The liver processes these nutrients, regulates metabolism, stores energy, and produces bile to help digest fats. Other options don’t handle digestion or nutrient processing directly: the heart and blood vessels mainly transport substances, kidneys and bladder filter waste, and skin and hair aren’t involved in digestion or metabolism.