Question

lo 4.2. what is the function of the respiratory system?breathing in oxygen and exhaling carbon dioxide.producing and circulating blood throughout the bodytransporting oxygen to the body cells and removing waste productsfiltering and eliminating waste from the bloodpumping blood through the body.

Explanation:

The respiratory system's main function is gas exchange. Breathing in oxygen (inhalation) and exhaling carbon dioxide (exhalation) is the core process of the respiratory system.

• Producing and circulating blood is mainly the function of the circulatory system (related to bone marrow for blood production and heart - blood vessels for circulation).
• Transporting oxygen to cells and removing waste (in a broader sense of the whole - body transport) is more of a combined function of the respiratory and circulatory systems, but the direct description of the respiratory system's function is gas exchange at the respiratory membrane level (inhalation - exhalation).
• Filtering and eliminating waste from the blood is a function of the excretory system (like the kidneys).
• Pumping blood is the function of the heart (part of the circulatory system).

Answer:

Breathing in oxygen and exhaling carbon dioxide.