The Air Pathway
The external structure through which air enters the system.
What is the Nose?
The movement of air into and out of the lungs, also known as breathing.
What is Ventilation?
Tiny air sacs where gas exchange occurs within the lungs.
What are the Alveoli?
These passages in the nose warm, moisten, and filter inhaled air.
What are the Nasal cavities?
The body system responsible for breathing and gas exchange.
What is the Respiratory system?
The throat; a common passageway for both food and air.
What is the Pharynx?
The process of air entering the lungs.
What is Inspiration (or Inhalation)?
Gas exchange occurring between the alveoli (lungs) and the blood.
What is External respiration?
The wall that divides the nasal cavity into two sides.
What is the Nasal septum?
Air-filled cavities in the skull around the nose.
What are the Sinuses?
This structure, known as the windpipe, connects the larynx to the bronchi.
What is the Trachea?
The process of air leaving the lungs.
What is Expiration (or Exhalation)?
Gas exchange occurring between the blood and the body tissues.
What is Internal respiration?
The voice box, which contains the vocal cords.
What is the Larynx?
The ultimate product of cellular respiration used by the body for energy.
What is ATP?
These are the two large main branches that split off the trachea and enter the lungs.
What are the Bronchi?
This is the overall process of gas exchange, including breathing and cellular energy production.
What is Respiration?
This process uses oxygen to break down glucose within cells and produce energy (ATP).
What is Cellular respiration?
The double-layered membrane that covers the lungs and lines the chest cavity.
What is the Pleura?
The two main gases exchanged in the respiratory system.
What are Oxygen and Carbon Dioxide?
After branching off the bronchi, these are the smaller tubes leading to the alveoli.
What are the Bronchioles?
This flap of cartilage covers the trachea to prevent food from entering the air passage during swallowing.
What is the Epiglottis?
The main organs of this system, responsible for all external gas exchange.
What are the Lungs?
Hair-like structures that line the respiratory tract to sweep mucus and particles away.
What are the Cilia?
A term that describes the main function of the Nasal cavities in preparing air for the lungs.
What is Warming, Moistening, and Filtering?