Sistem Ekskresi Manusia (Paru-paru)

The explanation focuses on the human excretory system, particularly the lungs, which are identified as excretory organs due to their role in expelling waste products such as carbon dioxide (CO2). The lungs, situated in the thoracic cavity, consist of various components including the trachea, bronchi, bronchioles, and alveoli. Their primary excretory function is to remove water vapor and CO2, which are transported by blood to be diffused and expelled through the nostrils. In addition to this excretory role, the lungs also protect the heart, balance pH levels, filter air, and store blood. The discussion transitions to lung diseases such as pneumonia (an infectious condition caused by viruses, bacteria, or fungi), legionnaires' disease (caused by the bacteria Legionella pneumophila), tuberculosis (TB, caused by Mycobacterium tuberculosis), and asthma (a chronic condition leading to airway inflammation and narrowing). Finally, the presenter hints at discussing ways to maintain lung health, concluding with a message meant for the audience's understanding of the pulmonary excretion system.