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9 Cards in this Set
- Front
- Back
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External respiration
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entrance of air into lungs and gas exchange between alveoli and blood
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Internal respiration
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exchange of gas between blood and the cells and intracellular process of respiration
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Cnidaria Respiration
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includes protozoa & hydra
cells in contact with external env't and respiratory gases exchange by simple diffusion |
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Annelids Respiration
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mucus on external surface (earthworms) used for gaseous exchange by diffusion (Oxygen in cells and carbon dioxide out to skin for excretion)
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Arthropod Respiration
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(grasshoppers) intake and removal of gases through tracheae and then through spiracles with carries of oxygen
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Human Respiration
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nose ->pharynx -> larynx -> trachea -> bronchi ->bronchioles -> alveoli
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Inhalation
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-diaphragm contracts and flattens
-external intercostal muscles flatten causing rib cage and chest wall to be pushed up and out -volume of thoracic cavity increases, decreasing pressure,causing lungs to fill with air |
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Exhalation
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-passive process
-lungs and chest highly elastic trying to recoil -diaphragm & external intercostal muscles relax -chest wall pushes inward -decrease in thoracic cavity volume causing air pressure increase -lungs deflate, forcing air out of the alveoli |
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Control of Ventilation
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regulated by neurons located in medulla oblongata whose rhythmic discharges stimulate intercoastal muscles and diaphragm to contract
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