BISC 220Lg Lecture Notes - Lecture 16: Bronchiole, Pleural Cavity, Red Blood Cell
6 Apr 2017
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Document Summary
The way they move around the body. Need large surface area covered with thin epithelium. Diffusion is limited by distance (so thin is needed) 23 levels of splitting for the bronchi. Body cavity is divided into two, divided by diaphragm. Called this because the inside is lined with a membrane/epithelium called pleuri. Outside of the lung also has a pleura covering. Smooth muscle cells around the terminal bronchiole. For any gas, express concentration as partial pressure = total p * fraction of total. Where the blood comes into the lung. Coming down from the top, arteriole, (branch of pulmonary artery) Right ventricle pumps blood into pulmonary artery. Changes to bigger bigger veins, and the oxygenated blood pumps into right atrium. Epithelial cell (only one wall), very flat 1/10 micrometer. Outer diameter of red blood cell is bigger than the inner diameter of a capillary. Inside of capillary is smooth, outside of red blood cell is smooth.
