MICROANATOMY

Detailed explanation-1: -The main organ of the respiratory system is the lungs. Other respiratory organs include the nose, the trachea and the breathing muscles (the diaphragm and the intercostal muscles).

Detailed explanation-2: -Gas exchange occurs in the respiratory zone of the lung, where alveoli are present. The respiratory zone of the lung includes respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli.

Detailed explanation-3: -Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

Detailed explanation-4: -The functions of the respiratory system include gas exchange, acid-base balance, phonation, pulmonary defense and metabolism, and the handling of bioactive materials.

Detailed explanation-5: -Nose. Mouth. Throat (pharynx) Voice box (larynx) Windpipe (trachea) Large airways (bronchi) Small airways (bronchioles) Lungs.