Respiratory System

• oxygen is to breathe, while ______ d______ is to ?

  carbon dioxide

  exhale
• it is the outer part of the system

  nose
• openings of the nose


  nosetrils
• what makes the lining of the nasal cavity moist?

  mucus
• what filters the dust and dirt that comes with the inhaled air

  musuc and nasal hair
• another word for throat cavity?

  pharynx
• it is a tube that acts as a passageway for both air and food

  pharynx
• another word for voicebox

  larynx
• windpipe

  trachea
• why cant you breathe and swallow at the same time?


  epiglottis
• when food accidentally goes into the trachea, what occurs?

  choking
• the trachea divides into two tubes that enters?

  a lung
• what are the two tubes the trachea divides into?

  bronchial tubes
• the bronchial tubes branch into?

  1. bronchioles
  2. alveoli

  bronchioles
• each bronchiole ends in tiny air sacs called?

  alveoli
• how much alveoli are in the lungs?

  300 to 600 million
• the alveoli give the lungs a large surface area releasing?


  carbon dioxide
• how much lobes does the right and left lungs have?

  3 and 2

  three and two
• each lung is enclosed in a membrane called?

  pleura
• below the lung is a dome-shaped organ called?

  diaphragm
• during inhalation the rib muscles?

  contract
• when the rib muscles contract, the rib cage?


  expands
• there are more than 200 viruses that may cause the common cold
• it causes discomfort, pain, itchiness in the throat

  throat infection
• an acute inflammation of the air passages within the lungs


  bronchitis
• an infection of one or both lungs caused by bacteria, viruses or fungi

  pneumonia
• it used to be a dreaded disease until the development of antibiotics

  tuberculosis
• one of the most common cancers in the world

  lung cancer
• it is responsible for the exchange of gases

  respiratory system
• it prevents the food from entering the trachea


  epiglottis
• it is a gas needed by humans

  oxygen