1 / 13

Lungs and Respiratory system

Lungs and Respiratory system. How do we get oxygen into the body?. Why do we need oxygen? . Aerobic cells need oxygen to make energy (remember the yeast lab?). Human Respiratory system. Path of oxygen: Mouth/nose  pharynx  larynx  trachea  bronchi  lung Lungs have these parts:

naiara
Télécharger la présentation

Lungs and Respiratory system

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Lungs and Respiratory system How do we get oxygen into the body?

  2. Why do we need oxygen? • Aerobic cells need oxygen to make energy • (remember the yeast lab?)

  3. Human Respiratory system • Path of oxygen: • Mouth/nose  pharynx  larynx  trachea  bronchi  lung • Lungs have these parts: • Bronchi  bronchioles  alveoli

  4. Nose • Function: prevent dust from getting into the lungs. • Structures: • Hair traps dust • Mucus traps dust

  5. Pharynx (again!) • Function: prevent food getting into the lungs • Structure: epiglottis, flap, closes when you swallow

  6. Larynx • Function: speaking • Structure: contains the vocal cords

  7. trachea • Function: passage of air • Structure: surrounded by cartilage

  8. Bronchi • Function: passage of air • Two tubes that split from the trachea

  9. Bronchioles • Function: passage of air • Structure: separates into smaller branches

  10. alveoli • Function: site of gas exchange • Structure: very thin walls, surrounded with capillaries. • Gas is carried in the blood by hemoglobin in RBC’s

  11. Breathing • The diaphragm is the muscle responsible for breathing • When it contracts it expands the chest cavity. Negative pressure pulls air into the lungs • http://www.youtube.com/watch?v=hp-gCvW8PRY

  12. Breathing • Breathing is controlled not by how much oxygen you have but by much CO2 is in your blood. • What can you do to hold your breath longer?

  13. Smoking and lung cancer?

More Related