Question

the lungs, nose, and trachea are organs of the respiratory system. which best describes these organs?
they deliver nutrients to the other tissues.
they deliver oxygen to the blood.
they are both used for support.
they help break down food.

Explanation:

The respiratory system's main function is gas exchange. The nose filters, warms, and moistens air. The trachea (windpipe) conducts air to the lungs. The lungs are the site of oxygen - carbon dioxide exchange. Oxygen from the inhaled air diffuses into the blood, and carbon dioxide diffuses out.

• Delivering nutrients to tissues is mainly the function of the circulatory system (along with the digestive system for nutrient absorption).
• Organs for support are in the skeletal system.
• Breaking down food is the function of the digestive system.

Answer:

They deliver oxygen to the blood.