Which system breaks down food into nutrients that can be absorbed by the body?

Which system breaks down food into nutrients that can be absorbed by the body?

• A. Digestive System
• B. Respiratory System
• C. Circulatory System
• D. Nervous System

Answer: (A)

The main idea is how digestion creates absorbable nutrients. The digestive system breaks down food into smaller molecules through chewing, stomach acid, and digestive enzymes, then nutrients are absorbed in the small intestine into the bloodstream to be used by the body. The other systems have different roles: the respiratory system handles breathing, the circulatory system transports nutrients and wastes but doesn’t digest food, and the nervous system coordinates reactions and body activities. So the system that actually breaks down food and makes nutrients available for absorption is the digestive system.

The main idea is how digestion creates absorbable nutrients. The digestive system breaks down food into smaller molecules through chewing, stomach acid, and digestive enzymes, then nutrients are absorbed in the small intestine into the bloodstream to be used by the body. The other systems have different roles: the respiratory system handles breathing, the circulatory system transports nutrients and wastes but doesn’t digest food, and the nervous system coordinates reactions and body activities. So the system that actually breaks down food and makes nutrients available for absorption is the digestive system.