PLB 115 1st Edition Lecture 7Previous Notes’ OutlineI.Cardio Vascular System & make-upII. Blooda. Formed elementsb. PlasmaIII. HeartIV. Anatomy of hearta. Ventriclesb. AtriaV. ArteriesVI. ArteriolesVII. VeinsCurrent Notes’ OutlineRespiratory systemI. Lungs a. Functions, componentsII. Capillaries & AlveoliIII. Problems with lung functionRespiratory SystemRespiratory System: Moves air into & out of body (utilizing many structures to do so)o Lungs: Allow gas exchange between air & blood Trachea: Tube. Carries air in & out of lungs. - Branches into Bronchi, Bronchioles, end in alveoli (small sacs where gas exchange takes place with a very large collective surface area)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Lung Function: Blood & air movement facilitated by blood & air movemento Blood enters lungs high in carbon dioxide & low in oxygen/air enters high in oxygen, low in carbon dioxide Carbon dioxide diffuses from blood to air. Oxygen diffuses from air to blood.Capillaries & AlveoliLungs= specialized: Blood (capillaries)& air (alveoli) come very close togethero Capillary & alveoli walls= really thin& allow diffusion of oxygen, carbon dioxide across their walls to get inside/outside themProblems with Lung Function: Reduction in gas exchange efficiency. o Poor pumping heart: reduces amount of blood sent to lungso Constriction of bronchioles: Reduces amount of air entering alveoli (causing asthma)o Reduction of # alveoli: Reduction in surface area for gas exchange (causing
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