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21 Cards in this Set
- Front
- Back
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What is the respiratory system |
Transports oxygen from external surroundings to the lungs (alveoli) |
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What is internal respiration |
Oxygen transport Tissue gas exchange |
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What is external respiration |
Pulmonary ventilation Pulmonary diffusion |
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How many lobes on the left and right lungs |
2 left & 3 right |
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What is the alveoli |
Thin walled, air filled sacs that are the site of gas exchange |
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What is inspiration |
Diaphragm contracts and moves down. Increase space in lungs, lowers pressure and air rushes in |
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What is expiration |
Diaphragm relaxes. Less space in lungs and air leaves |
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What is the tidal volume |
Volume of air we inspire or expire per breath |
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What is minute ventilation |
Amount of air we inspire each minute |
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How do we measure tidal volume and minute ventilation |
Spirometry & Forced vital capacity |
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What do stretch receptors do in the airway |
Prevent over inflation |
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What are chemoreceptors |
Central - located in the brain Peripheral - In the aortic arch & carotid artery |
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Where is pulmonary circulation going |
To the lungs |
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Where is systematic circulation going |
Around the body and pumps oxygen to tissues |
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What are capillaries |
Site of gas exchange |
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What is the average cardiac output (amount of blood pumped around body per minute) |
5-6 litres per minute |
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What is the pacemaker of the heart |
Sinoatrial node |
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What is neural regulation |
Parasympathetic & sympathetic nervous systems |
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What is systolic blood pressure |
Highest in the arteries resulting from contraction of heart |
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What is diastolic blood pressure |
Occurs when the heart relaxes to refill |
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What are the 4 functions of blood |
Transport Defence Thermoregulation Maintain pH |
