Question

just like tissues combine to form organs, organs combine to form organ systems. organs work together to carry out the function of the organ system.
the paragraphs describe how some organs work together in the body. match each paragraph to the organ system it describes.
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 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.

Explanation:

• The first paragraph mentions esophagus, stomach, intestines which are part of the digestive system.
• The second paragraph mentions diaphragm, trachea, lungs which are part of the respiratory system.
• The third paragraph mentions heart, blood vessels which are part of the circulatory system.

Answer:

• First paragraph: The digestive system.
• Second paragraph: The respiratory system.
• Third paragraph: The circulatory system.