Which of the following is a primary function of the digestive system?

Explanation

The digestive systems primary function is absorbing nutrients from food. It breaks down food mechanically and chemically, then absorbs nutrients into the bloodstream for use by the body.

Oxygen transport is the circulatory systems job. Temperature regulation involves skin and metabolism. Hormone production is the endocrine systems function.

In farm animals, understanding digestion helps farmers provide appropriate feed. Ruminants have complex four-chambered stomachs; monogastric animals (pigs, poultry) have simpler systems.