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Respiratory System In Class Notes Functions • To supply the blood with oxygen – Oxygen is needed throughout the body – The body does this through breathing • Breathing also helps the environment! – We lean on the trees for oxygen and the truth is they need us too! Organs Involved • Mouth – Takes in air leading to the… • Trachea! – Not the esophagus though! In this tube air travels downward and splits of into bronchi (plural). I bet you know were this goes • Lungs – Smaller cavities in the lungs, alveoli, hold oxygen in themselves. The lungs take oxygen and ship it to the blood stream • Diaphragm – A muscular sheet lying below the lungs. It allows for the lungs to contract (expel carbon dioxide) and expand (take in oxygen). • Nose – Winner of honorable mention. Air is also, and more healthily, through the nose. The warmth that air gets through the nose helps the throat Bronchioles 1. Air enters through nose or mouth 2. Air goes through the pharynx and larynx (aka. vocal cords), and into the trachea 3. Air enters lungs through trachea, bronchi break off of trachea 4. Bronchioles then branch off the two bronchi 5. At the tip of the thousands of each bronchiole are alveoli 6. Oxygen is exchanged with Carbon Dioxide from blood 7. Carbon Dioxide exits body by the same path as oxygen entered How is breathing regulated? • What organ controls it? The lung and brain and heart • What causes increases and decreases in rates? Activity stress and many others What effects does smoking have on the respiratory system? • • • • • • Cancer Diffuculty Hackers cough Tarry lungs Shutdown of RS Raised blood pressure Name at least 3 disorders & provide a description: Asthma– causes breathing difficulty and cuts off oxygen flow Pneumonia – causes coughing fever and vomiting but all really bad TB – cough up blood and others like death and chest pain appetite loss