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Respiratory How we breathe Parts and Pieces Nose Trachea Lungs Alveoli Nose Air enters the nose Tiny hairs filter out dust and particles. Tissues moisten and warm the air, making it more suited for the lung environment. Trachea Long tube delivers air to the left and right Bronchi (wind pipe) The Trachea runs down the front of your neck Lungs The largest organ in the respiratory system You have two. One is larger than the other. The right lung has three lobes and the left lung has two lobes. Why???? Alveoli Small air sacks used to transfer o2 and CO2 in an exchange of gas. The Alveoli are surround by blood vessels so small the air can pass right through the cell wall. HOW IT WORKS The grapelike arrangement of alveoli creates an enormous surface area sufficient for exchanging enough oxygen and carbon dioxide for the entire body. That’s crazy! Almost Done Let us take a look at a good set of healthy lungs, shall we??? Nice lungs Now, let us look at a set of lungs from a smoker. Tumor that collapse my fathers lung Warning Look away now pretty gross stuff summary Air (comprised primarily of nitrogen and only about 21% oxygen) enters the nose, where tiny hairs filter out dust and particles. Tissues moisten and warm the air, making it more suited for the lung environment. Air passes from the pharynx to the larynx (containing two elastic vocal cords) and into the trachea. The trachea divides into the left and right bronchi which subdivide into smaller and smaller tubes called bronchioles. These airways are lined by mucous membranes and countless cilia which trap and remove particles from the lungs. Bronchioles open into the alveoli which are clustered like grapes. Only one cell thick, alveoli have direct contact with capillaries for gas exchange. The grapelike arrangement of alveoli creates an enormous surface area sufficient for exchanging enough oxygen and carbon dioxide for the entire body.