Which system primarily absorbs nutrients after digestion?

The digestive system is responsible for the absorption of nutrients after food has been digested. During the digestion process, food is broken down into smaller components like carbohydrates, proteins, and fats. These nutrients are then absorbed primarily in the small intestine, where the walls are lined with villi and microvilli that increase the surface area to maximize absorption.

Once nutrients are absorbed into the bloodstream, they can be transported throughout the body to provide energy, support growth, and maintain bodily functions. The digestive system is specifically designed for this purpose, utilizing specialized organs such as the stomach, small intestine, and pancreas, which all play critical roles in breaking down food and facilitating the absorption process.

The other systems listed do not primarily focus on nutrient absorption. The respiratory system is involved in gas exchange, the circulatory system aids in the transport of blood and nutrients but does not absorb them, and the nervous system is responsible for controlling and coordinating bodily functions rather than nutrient absorption. Thus, the digestive system is the correct choice for the primary role of nutrient absorption after digestion.