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Video: Txoj kev ncig ntshav cuam tshuam nrog kev ua pa li cas?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
KEY CONCEPT Cov ua pa thiab circulatory systems nqa cov pa oxygen thiab cov as-ham rau cov hlwb. Cov ua pa thiab circulatory systems ua hauj lwm ua ke kom tswj tau homeostasis. Cov ua pa system txav cov roj nkag mus thiab tawm ntawm cov ntshav. Lub ntsws muaj cov bronchi, bronchioles, thiab alveoli.
Ib yam nkaus, tib neeg nug, kev sib txuas ntawm cov hlab ntshav thiab cov pa ua pa sib txuas li cas?
Cov ua pa system ua haujlwm ncaj qha nrog circulatory system muab cov pa oxygen rau lub cev. Cov pa oxygen tau txais los ntawm ua pa system txav mus rau hauv cov hlab ntshav uas tom qab ntawd xa cov pa oxygen ntau rau cov nqaij thiab cov cell.
Ib yam li ntawd, qhov chaw ua pa thiab lub cev sib txuas sib txuas nyob qhov twg? Cov ntshav ncig thiab kev ua pa ua haujlwm ua ke kom xa cov ntshav thiab cov pa oxygen thoob plaws lub cev. Cua txav mus thiab tawm ntawm lub ntsws los ntawm lub ntsws, bronchi, thiab bronchioles. Ntshav txav hauv thiab tawm ntawm lub ntsws los ntawm cov hlab ntsws thiab cov leeg uas txuas mus rau lub plawv.
Hauv qhov no, cov kab ke endocrine cuam tshuam nrog kev ua pa li cas?
Endocrine tswj ua lub luag haujlwm, nrog rau lwm yam, hauv txoj cai/kev hloov kho ntawm ua pa hauv qee qhov tsis meej. Ua pa Raws li kev ua haujlwm tseem ceeb tsis tau tswj hwm los ntawm cov tshuaj hormones tshwj xeeb. Qee cov tshuaj hormones tuaj yeem ua rau ua pa cov hlab ntsws, ua rau hnoos hnoos qeev (epinephrine) lossis bronchoconstriction (histamine).
Lub tshuab ua pa ua haujlwm li cas?
Tib neeg ua pa system yog ib tug series ntawm lub cev lub luag hauj lwm rau kev noj nyob rau hauv oxygen thiab tshem tawm carbon dioxide. Cov ntshav tom qab ntawd khaws cov pa roj carbon dioxide thiab lwm yam khoom pov tseg thiab thauj lawv rov qab mus rau lub ntsws, qhov uas lawv tau tso tawm ntawm lub cev thaum peb nqus pa, raws li American Lung Association.
Pom zoo:
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Coronary circulatory system, ib feem ntawm cov kab ke ua haujlwm hauv lub cev uas muab cov ntshav mus rau thiab muab cov kua ntws los ntawm cov nqaij hauv plawv. Deoxygenated ntshav raug xa rov qab mus rau hauv chav ntawm lub plawv los ntawm cov leeg hlab plawv; Feem ntau ntawm cov no sib sau ua ke tsim cov hlab ntshav venous, uas ntws mus rau sab xis atrium
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Lub paj hlwb positron emission tomography (PET) scan yog kev ntsuas duab uas tso cai rau cov kws kho mob pom tias koj lub hlwb ua haujlwm zoo li cas. Kev tshuaj xyuas ntes cov duab ntawm kev ua haujlwm ntawm lub hlwb tom qab cov tshuaj tiv thaiv kab mob "tracers" tau nqus mus rau hauv cov ntshav. Cov neeg taug kev no "txuas" rau cov sib txuas zoo li qab zib (qab zib)
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Kab mob hauv lub plawv Coronary artery disease. Atherosclerosis, arteriosclerosis, thiab arteriolosclerosis. Mob stroke. Mob ntshav siab. Lub plawv tsis ua hauj lwm. Aortic dissection thiab aneurysm. Myocarditis thiab pericarditis. Cardiomyopathy
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Lub teeb yog refracted thaum nws hla lub interface los ntawm huab cua rau hauv iav uas nws txav qeeb dua. Txij li thaum lub teeb hloov pauv ntawm lub interface, lub nthwv dej ntawm lub teeb yuav tsum hloov, ib yam nkaus. Lub wavelength txo qis thaum lub teeb nkag mus rau nruab nrab thiab lub teeb yoj hloov pauv kev taw qhia
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Lub luag haujlwm tseem ceeb ntawm cov qe ntshav liab yog thauj cov pa oxygen ncig lub cev mus rau lwm lub hlwb. Nws cov duab biconcave maximizes thaj chaw saum npoo kom ua tau zoo ntawm oxygen nqus. Nws cov duab kuj tso cai rau nws "squeeze" los ntawm cov hlab ntsha nqaim thiab tuaj yeem nkag mus txawm tias cov hlab ntsha thinnest nyob ib ncig ntawm lub cev