diffusion - The no-energy movement of gases into or out of the bloodstream from high to low concentration (from packed together to more spread out). This movement is how the process of gas exchange occurs. , capillary - Very thin-walled blood vessels that wrap around our lungs or other organs to allow for a quick transfer of materials. The thin walls make these the best location for gas exchange., villi - Structures within the small intestine that contain capillaries, which allow glucose to move into the bloodstream to help with cellular respiration. , nostrils - The two openings at the front of the nose, through which it is best to INHALE air, nasal cavity - The open space behind the nostrils that contains mucus & cilia to filter the incoming air (and it also has blood vessels), trachea - The main tube for air that leads to and from your lungs. Also called the windpipe. Surrounded by cartilage to make sure it stays open. Contains mucus (and cilia) as another filter to trap contaminants before they would reach the lungs., bronchi - The 2 tubes that branch off the trachea, leading directly into the right and left lung. These branches become smaller and smaller inside of the lungs. They contain mucus (and cilia) as one final location for filtering contaminants out of the incoming air., alveoli - The tiny balloon-like sacs for air that are at the ends of the bronchi and are surrounded by many tiny capillaries. These are the location of gas exchange which allows cellular respiration to occur in the rest of our body., cilia - Hair-like structures in the nasal cavity, trachea, and bronchi that sweep 'used' mucus to the throat for removal, mucus - A sticky, wet substance in the nasal cavity, trachea, and bronchi that catches contaminants as the air passes through, gas exchange - A process within our capillaries when substances move into or out of the blood. If this happens at the alveoli, oxygen moves INTO the blood from the alveoli. If this happens at a different organ, oxygen moves OUT OF the blood into that organ that needs it. , cellular respiration - The energy-production process that occurs within our cells. Oxygen breaks down glucose to make energy. Carbon dioxide and water vapor are also made as waste products. , oxygen - The gas that we inhale from the air; it is one necesary ingredient for making usable energy in cells, carbon dioxide - A gas that we exhale to the air; it is one 'waste product' created as we make usuable energy in cells., water vapor - A gas that we exhale to the air; it is one 'waste product' created as we make usable energy in cells. (It is sometimes a gas form and sometimes a helpful liquid form in our bodies.),

Unit 9 GOLD

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