GENERAL HISTOLOGY

Detailed explanation-1: -Therefore, lungs help in expelling or eliminating carbon dioxide which is a waste substance for the body. Along with carbon dioxide, the lungs also give out water in the form of water vapour.

Detailed explanation-2: -The lungs and respiratory system allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out.

Detailed explanation-3: -CO2 is transported in the bloodstream to the lungs where it is ultimately removed from the body through exhalation. CO2 plays various roles in the human body including regulation of blood pH, respiratory drive, and affinity of hemoglobin for oxygen (O2).

Detailed explanation-4: -It is known as an accessory excretory organ because, during cellular respiration, the lungs give out carbon dioxide as their waste product.

Detailed explanation-5: -Lungs are the primary organs of the respiratory system. Since they help in the elimination of carbon dioxide, they also form a part of the excretory system.