Physiology 2130 Lecture Notes - Circulatory System, Reversible Reaction, Erythropoietin
31 Jan 2014
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Document Summary
Functions: transport of oxygen from air into blood, removal of co2 from blood into air, control of the blood acidity (ph, temperature regulation, defense to airborne particles. Anatomy: lungs located in thoracic cavity, surrounded by rib cage and diaphragm, airways: nasal cavity and mouth, joining at pharynx. Pharynx leads to larynx (voice box) which becomes trachea. Trachea divides into two main bronchi (left and right), which continually divide into smaller and smaller bronchioles. Narrow as 0. 3 microns: cells of immune system, include microphages and lymphocytes, protecting from airborne particles going into alveoli, fibers of elastin & collagen in walls of alveoli, around blood vessels and bronchi. Intrapleural pressure: two thin pleural membranes: one lines and sticks to ribs (parietal pleura), other surrounds and sticks to lungs (visceral pleura, form intrapleural space containing pleural uid (~10-15 ml, fluid reduces friction between pleural membranes during breathing. Alveolar & atmospheric pressure: pressure inside lungs is called alveolar (intrapulmonary) pressure.
