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18 Cards in this Set
- Front
- Back
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What is our atmosphere made of?
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Nitrogen 78%, oxygen 21%, other 1%
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Why is breathing important?
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Exchange of O2 and CO2 between the environment and our bodies
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What is O2 used for?
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All cells require O2 for cellular respiration, energy
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Other gases in the resp. system?
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CO2 and H2O, expelled as waste
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General functions of the Resp. system
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.Intake of oxygen for Cellular Respiration
.Exhale carbon dioxide .Preservation of life |
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What is Gas exchange
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The process of diffusion that allows for Carbon Dioxide to leave the capillaries surrounding the alveoli while facilitating the entrace of oxygen into the capillary. Carbon Dioxid out:oxygen in
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What is the larynx?
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The ligaments, voice box, vocal chords
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What is the trachea?
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Windpipe, Takes ari into the longs. Lined with cilia has mucus
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What are cartilage rings?
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.Provide support
.Keep trachea open |
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What are Bronchi?
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Two branches of the trachea, Contain cartilage, Go to right and left lungs
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What are bronchioles?
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Smaller branches inside each lung that are less tha 1mm in diameter. No cartilage, Rings of muscle -change diameter
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What are alveoli?
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The point of gas exchange, THe overall purpose is to increase surgface area for gas exchange, Very thin air sacs, site of gas diffusion
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What is the pleural Membrane?
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Outer surface of lungs, Inner wall of chest cavity, Reduced friction
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What is the diaphragm?
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.Band of muscles shaped like a dome
.Separates thracic cavity from abdominal cavity .Helps in breathing |
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What do the ribs protect?
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the thracic cavity
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What are intercostal muscles?
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Muscles between the ribs that aid in breathing.
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What are the steps of inhalation?
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1.Diaphragm contracts
2.Intercostal muscles contract 3.Increase in Lung volume 4.Environmental aid pressure is greater than the lung pressure 5.Air rushes in to equalize pressure |
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What are the steps of exhalation?
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1.Diaphragm relaxes up
2.Intercostal muscles relax 3.Decrease in lung volume 4.Lung pressure is greater than environmental air pressure 5.Air rushes out to equalize pressure |
