Circulatory
System Immune System Excretory System Disease Prevention
Click
on the picture below to go to a web page.
How System Works
Inhale: When you begin to inhale, the rib
muscles tighten, and get shorter, pulling the chest out and up. The
diaphragm tightens, and moves down, further
increasing the space inside the chest.
When the space inside the chest increases, the lungs expand and air
rushes in. Air goes down the
windpipe/Trachea into the bronchial tubes and into the lungs. Alveoli in
the lungs exchange O2 and CO2.
Exhale: When you begin to exhale, the rib
muscles relax, and get longer, and the chest gets smaller. The diaphragm relaxes and moves up,
making less space in the chest. Air
is forced out of the lungs, as the space inside the chest gets smaller.
What Body Parts are
Included
Nose, mouth, lungs,
esophagus, epiglottis, vocal cords, larynx, red-blood cells,
bronchial
tubes, sinus areas, tonsils, throat, ribs, cilia, diaphragm, and chest.
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What System
Needs to Work Properly
Ø Oxygen
and carbon dioxide
Ø Structure
of the lungs and respiratory pump
Ø Passive
and mechanical properties
Ø Ventilation
and dynamics of breathing
Ø Distribution
of ventilation
Ø Aspects
of the regulation of the breathing pattern
Ø Transport
of gasses
Interesting
Facts
Ø You
only talk when you exhale
Ø Vocal
cords are used in the system for breathing
Ø Breath
13 pints of air a minute
Ø Each lung
contains 300-350 million respiratory units called alveoli making a total of
700 million in both lungs
How System
Prevents Diseases
It
keeps oxygen going to the brain, keeping it alive, lets it tell white blood
cells to kill bacteria and viruses.
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Adam,
Nikki, McKenzie, Travis, and Turner
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