Question Answer
 1. Air Sacs:  This is where oxygen enters the blood and carbon dioxide leaves the blood.
 2. Alveoli:  Another name for air sacs.
 3. Cilia:  Tiny, hairlike structures on cells
 4. Diseases of the Respiratory System:  1) Cold

 2) Influenza (flu)
 3) Pneumonia
 4) Tuberculosis
 5) Lung Cancer
 5. How do the respiratory & circulatory systems work together?  The respiatory system gets the oxygen all the way to the tiny air sacs in the lungs. At the air sacs the blood “picks up” the oxygen and then carries the oxygen to all your cells.
 6. Mucus:  A sticky, thick fluid that traps dust, germs and other things that might be in the air
 7. Trachea:  A tube that carries air from the larynx to the lungs.
 8. What 2 things happen at the same time in the air sacs?  1) Oxygen leaves the lungs and enters the blood.
2) Carbon dioxide leaves the blood and enters the lungs
 9. What do cilia in the respiratory do?  Help clean air by waving very rapidly. The waving pushes dirty mucous out of the lungs to the throat where it is swallowed.
 10. What is asthma? 1) A disease of the respiratory system.

2) It is when the bronchioles are narrowed which prevents air from easily traveling though the lungs.
 11. What is the cause of a cold AND influenza (flu)?  A virus
 12. What is the cause of lung cancer?  Tobacco & chemicals
 13. What is the cause of pneumonia?  Either bacteria OR virus
 14. What is the cause of Tuberculosis?  Bacteria
 15. What is the job of the respiratory system?  To carry gases between the outside air and your blood
 16. What is vital lung capacity?  The amount of air that a person can blow out after a deep breath
 17. Where can cilia be found?  In the linings of many parts of the respiratory system


1. Alveoli   small thin sacs at the end of each bronchus. Gas exchange takes place here.
2. bronchi   these are the branches of the trachea inside the lungs. Each branch, which divides into smaller and smaller branches is called a bronchus. These branches empty air into the alveoli.
3. capillary   A tiny blood vessel – oxygen from tubes enters the blood cells of the capillaries – the capillaries then take the oxygen to the rest of your cells.
4. cellular respiration   cells get their energy from glucose through this process
5. diaphragm   Large flat sheet of muscle that contracts controlling the movement of air into and out of the lungs
6. diffusion   Movement of particles from areas of high concentration to low concentration. ( walls of the alveoli are thin that gases like oxygen and carbon dioxide can pass thru them)
7. exhale   To breathe out- your lungs empty of air
8. inhale   To breathe in and air enters your body through your mouth and nose
9. lungs   Organs that fill with air when you inhale. When you inhale – they expand like balloons
10. Trachea   A Strong tube that is divided into 2 branches that connect to the lungs