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Respiratory system does what? Delivers oxygen to and from the blood.
Upper respiratory tract contains: nose (nasal cavity, sinuses), mouth, larynx, and trachea (windpipe)
lower respiratory tract contains: lungs, bronchi, and alveoli
URI upper respiratory infection
Respiration the act of breathing
inspiration muscle contraction. increases lung volume, allowing air to rush in. 21% oxygen, no CO2.
expiration muscle relaxation. decreases lung volume, air passively flows out. 16% oxygen 4.5% CO2.
pulmonary circulatory circuit the process whereby oxygen and CO2 are delivered to and from the lungs.
oxygen-poor blood travels to the right atrium then to the right ventricle
oxygen-rich blood pulmonary veins carry to the heart for distibution
nose (nasal hairs and mucus) filter, warms, and moistens
when food is swallowed the opening of the larynx (the epiglottis) automatically closes, preventing food from being inhaled
larynx also contains the vocal cords
bronchi divide into smaller tubes called bronchioles
bronchial stuctures contain cilia
alveoli small, thin-walled "balloons" arranged in clusters
gas exchange occurs where? at the alveoli
functions of the respiratory system breathing process, exchange of O and CO2, enable speech production
epiglottis acts as a lid or flap that covers the larynx and trachea (airway) so food does not enter the lungs
trachea no gaseous exchange
bronchi c-shaped cartilage rings with smooth muscle, each bronchi divides into bronchioles, terminate in air sacs called aveoli
pleuralitis inflamed lungs
phrenic nerve conveys impulses between CNS and some other body region
external respiration exchange of gases in lungs
internal respiration exchange of gases within cells of the body organs and tissues
vetilation movement of air
COPD chronic obstructive pulmonary disease (COLD)
Dyspnea difficulty breathing, shortness of breath
Bradypnea slow breathing
Tachypnea fast breathing
PND paroxysmal nocturnal dyspnea. acute dyspnea caused by lung conjestion and edema that results from partial heart failure and occurs suddenly at night.
expectorants expell mucus
barrel-chest chest stays in a constant expansion to compensate for lack of oxygen
avoid aspirin in children because it could cause Reyes syndrome
Can cause COPD asthma, chronic Bronchitis, emohysema
Created by: SpecialK1942