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Main (primary) bronchus
one of the two large respiratory tubes (right & left) that branches from the trachea & enters the lung
the muscle that separates the thoracic cavity from the abdominopelvic cavity which contracts during inspiration (pulls down toward your toes)
-serous membrane which lines the thoracic wall & the mediastinum
-covers the superior surface of the diaphragm on each side of the thoracic cavity
the branching network of airways, from the main bronchi through the terminal bronchioles, that conducts air with each lung
Lobar (secondary) bronchus
a respiratory tube that branches from a main bronchus & leads into one lung lobe
Segmental (tertiary) bronchus
a respiratory tube that branches from a secondary bronchus & leads into one bronchiopulmonary segment of the lung
the airways from the nasal cavity through the terminal bronchioles, that conduct air to the respiratory zones of the lungs
the force of attraction between water molecules at an air-water surface, which draws water molecules closer together
a mixture of phospholipids & lipoproteins which lowers the surface tension of the alveolar fluid
What is the respiratory membrane composed of?
-simple squamous epithelium lining the alveoli
-endothelium of the pulmonary capillary walls
-both the above's fused basement membrane
an enzyme found in red blood cells that speeds the conversion of carbon dioxide and water to carbonic acid
-aka alveolar macrophage
-a type of macrophage found in the pulmonary alveolus which reside on respiratory surfaces & cleans off particles such as dust or microorganisms
Respiratory Distress Syndrome (RDS)
a condition most often caused by absence or impairment of the surfactant in the fluid that lines the alveoli
air that occupies the space between the mouth and alveoli but that does not actually reach the area of gas exchange
the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures exerted by each individual gas
the solubility of a gas in a liquid is directly proportional to the partial pressure of that gas on the surface of the liquid
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