The Respiratory Tract
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The Respiratory Tract

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Questions and Answers

What is the function of the upper respiratory tract?

  • To carry air to the lower respiratory tract (correct)
  • To breathe in oxygen and breathe out carbon dioxide
  • To direct air into the lungs
  • To exchange oxygen and carbon dioxide

    • What is the primary function of the lungs?

  • To breathe in oxygen and breathe out carbon dioxide
  • To allow gases to move in and out of the body (correct)
  • To regulate body temperature
  • To protect the body from foreign particles

    • What is the diaphragm?

  • A bony shield of protection for the lungs
  • A muscle that separates the chest cavity from the abdominal cavity (correct)
  • A thin, broad muscle that sits above the lungs
  • A pair of airways that direct air into the lungs

    • What happens to the diaphragm when you breathe in?

    <p>It contracts and flattens out, creating space in the lungs</p> Signup and view all the answers

    What are the airways called that direct air into the lungs?

    <p>Bronchi</p> Signup and view all the answers

    What is the function of the bronchioles?

    <p>To divide into smaller airways</p> Signup and view all the answers

    What is the waste gas given off by cells when they do work?

    <p>Carbon dioxide</p> Signup and view all the answers

    What happens to the diaphragm when you breathe out?

    <p>It contracts and pushes air out of the lungs</p> Signup and view all the answers

    What is the name of the bony shield of protection for the lungs?

    <p>Ribcage</p> Signup and view all the answers

    What is the purpose of the lower respiratory tract?

    <p>To exchange oxygen and carbon dioxide</p> Signup and view all the answers

    Study Notes

    The Respiratory Tract

    • The respiratory system has two parts: the upper respiratory tract and the lower respiratory tract.
    • The upper respiratory tract includes the nose, mouth, throat, larynx, and trachea, and carries air to the lower respiratory tract.

    Lungs and Diaphragm

    • The lungs are organs that allow gases to move in and out of the body.
    • The lungs take up much of the space underneath the ribs, which act as a bony shield of protection.
    • Even when empty, the lungs are not hollow like balloons, but rather resemble a porous sponge.
    • The diaphragm is a thin, broad muscle that sits below the lungs and helps breathe oxygen-filled air into the lungs when it contracts.
    • When the diaphragm relaxes, it pushes stale air out of the lungs.

    Bronchi and Bronchioles

    • Air enters the lungs through a pair of airways called bronchi (bronchial tubes).
    • The bronchi divide into smaller airways called bronchioles inside the lungs.
    • The bronchi and bronchioles spread out like a tree, with the thick bronchi resembling tree trunks and the multiple bronchioles resembling branches.

    Alveoli

    • The bronchioles branch into smaller and smaller twigs until they end in tiny air sacs called alveoli.
    • Alveoli resemble a bunch of grapes covered in spider webs, with the spider webs being tiny blood vessels.
    • Oxygen passes through the thin walls of the alveoli and into the bloodstream, while carbon dioxide moves out of the blood and into the alveoli.

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    Description

    Learn about the upper and lower respiratory tracts, and how they work together to bring oxygen in and carbon dioxide out of the body.

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