RS HW Questions

• Describe the path of air into and out of the lungs

  atmosphere, nasal/oral cavity, pharynx, larynx, trachea, bronchus, bronchiole, alveoli, (gas exchange), bronchiole, bronchi, trachea, larynx, pharynx, nasal/oral cavity, atmosphere
• Why do hairs line the nasal passageways?


  To capture particles in the air that we are breathing in
• What is the function of mucus in the nasal cavity?


  Moisten air coming in, catch pathogens and other particles, contain helpful bacteria/cells that fight off pathogens
• Why is it important that the trachea is made up of cartilage rings?

  To keep to the shape of the tube and allow air to come in and out without the tube collasping
• Why is the trachea lined with cilia?

  To sweep out particles so they don't go down into the lungs
• How does the body prevent food from entering the airways?

  The soft plate moves up to cover the nasal cavity in the pharynx. The epiglottis, a flap of tissue, covers the opening of the larynx (glottis) and the trachea to prevent food from entering the airways.
• Why is the larynx made up of two sheets of elastic ligaments?

  Vocal cords- allows us to produce sounds