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Breathing system
Chapter 30
| Question | Answer |
|---|---|
| state where the breathing system is located | breath in through the nose or mouth and in through the trachea and to the lungs |
| nasal passages and mouth | walls of nasal passages have hairs which filter air |
| pharynx | passage at the back of the mouth, epiglottis is a flap of tissue that covers the trachea when food is swallowed, it prevents food going down the wrong way |
| layrnx | short passage called the voice box which contains vocal cords. produce sounds when air is passed through them |
| trachea | a tube supported by by rings of cartilage, divides to form two bronchi - one goes to each lung. inner walls contain cilia and mucus secreting |
| lungs | soft spongy organs contained in a double membrane called the pleura. bronchi subdivide to bronchioles, then alveoli which are a network of blood capillaries that allow gaseous exchange |
| state the function of cartilage | supports the trachea so it doesn't collapse when air isn't passing |
| describe the adaptions of alveoli | alveoli has a large surface area of 90m2, short distance between air and blood, walls of alveoli are elastic, blood is under high pressure and thin walls in the alveoli are only one cell thick |
| breathing disorder, cause, prevention and treatment | asthma, allergy inflammation and pollen, avoid the cause of allergy (clean air) and inhaler or widen bronchioles |
| name the gas that controls breathing and how | carbon dioxide, it dissolves in the blood plasma, causing a faster rate of breathing |
Created by:
Kamilex
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