Question

paragraph to the organ system it describes. the diaphragm contracts to move air through the nose and trachea to the lungs, where gas exchange delivers oxygen to the blood and removes carbon dioxide. the heart pumps blood through the blood vessels, which deliver oxygen and nutrients to cells throughout the body. the esophagus moves chewed food from the mouth to the stomach, where it is broken down. the intestines absorb nutrients and water from the food, then send waste out of the body. the circulatory system the respiratory system the digestive system

Explanation:

The first paragraph describes air - movement and gas - exchange, which is the function of the respiratory system. The second paragraph is about blood - pumping and nutrient - delivery by the heart and blood vessels, characteristic of the circulatory system. The third paragraph details food - movement, breakdown, nutrient and water absorption, and waste - expulsion, which are functions of the digestive system.

Answer:

The diaphragm description: The respiratory system
The heart description: The circulatory system
The esophagus and intestines description: The digestive system