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:

1. Analyze each option:

• Option 1: Delivering nutrients is the role of the circulatory system, not the respiratory system. So this is incorrect.
• Option 2: The lungs, nose, and trachea are part of the respiratory system. The main function of the respiratory system is to take in oxygen and expel carbon dioxide. The lungs, nose, and trachea help in delivering oxygen to the blood (and removing carbon dioxide). This is correct.
• Option 3: Support is the role of the skeletal system, not the respiratory organs. So this is incorrect.
• Option 4: Breaking down food is the role of the digestive system, not the respiratory system. So this is incorrect.

Answer:

B. They deliver oxygen to the blood (assuming the second option is labeled B, if the original options had labels like A, B, C, D, we would use the correct label. Since the options are presented as checkboxes, the correct statement is "They deliver oxygen to the blood")