Atelectasis (/ËÃ¦táµ»ËlÉktÉsáµ»s/ uses combining forms of atel- + ectasis, from Greek: á¼ÏÎµÎ»Î®Ï, incomplete + á¼ÎºÏÎ±ÏÎ¹Ï, extension) is the collapse or closure of a lung resulting in reduced or absent gas exchange.
A single capillary is so small that it allows only one blood cell to flow through it at a time. The capillary walls are also very small, only one cell thick. These thin walls easily allow water, oxygen, carbon dioxide, and other nutrient and waste substances to exchange between blood cells and the surrounding tissue.
A) Because capillaries depend on the lower pressure to prevent fluid exchange between the capillaries and the tissue fluid. B) Because capillaries are fragile and extremely permeable. Answer (B) Capillaries are fragile and extremely permeable C) Because capillaries actually are high-pressure vessels. D) Because capillaries actually need a higher blood pressure for filtration activities. A sustained blood pressure of 140/90 or greater indicates hypertension in the patient. True Answer True