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Video: Puas yog cov leeg ntshav qis dua?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Nco qab tias cov ntshav txav los ntawm siab dua siab rau siab dua . Nws yog nqus los ntawm lub plawv mus rau hauv cov hlab ntsha ntawm siab siab . Txij thaum siab hauv cov leeg yog feem ntau kuj qis , kom ntshav ntws rov los rau hauv plawv, siab hauv atria thaum lub sij hawm atrial diastole yuav tsum yog txawm qis dua.
Hauv qhov hais txog qhov no, vim li cas cov leeg ntshav qis dua?
Venules thiab leeg Ntshav ntws los ntawm cov hlab ntsha mus rau qhov me me leeg hu ua venules, tom qab ntawd mus rau hauv leeg uas coj rov qab mus rau lub siab. Cov leeg muaj cov phab ntsa thinner ntau dua li cov hlab ntsha, feem ntau vim yog siab hauv leeg ntau heev qis dua . Cov leeg tuaj yeem nthuav dav (dilate) raws li cov kua hauv lawv nce.
Ib yam nkaus, cov hlab ntsha twg yog ntshav siab qis tshaj? Tseem ceeb: Qhov siab tshaj siab ntawm circulating ntshav tau pom hauv cov hlab ntsha, thiab kawm tiav qis dua li qhov ntshav ntws los ntawm cov hlab ntsha, cov hlab ntsha, cov hlab ntshav, thiab cov leeg (qhov uas nws yog qis tshaj ). Qhov loj tshaj poob rau hauv ntshav siab tshwm sim ntawm kev hloov ntawm cov hlab ntsha mus rau arterioles.
Kuj paub, ntshav siab qis hauv cov leeg lossis cov hlab ntshav?
Cov leeg nqa ntshav rov qab los rau koj lub siab los ntawm tag nrho koj lub cev. Cov siab ntawm ntshav rov qab mus rau lub plawv yog tsawg heev, yog li cov phab ntsa ntawm leeg muaj ntau thinner dua cov hlab ntsha. Capillaries yog me me ntshav cov hlab ntsha uas txuas cov hlab ntsha thiab leeg . Lawv cov phab ntsa yog nyias heev.
Cov hlab ntsha puas ua haujlwm hauv siab?
Cov hlab ntsha yog cov hlab ntsha uas nqa cov ntshav tawm ntawm lub plawv. Vim lawv yog nyob rau hauv siab , cov hlab ntsha muaj zog elastic phab ntsa. Cov leeg yog cov hlab ntshav uas nqa ntshav rov qab mus rau lub plawv. Lawv muaj cov phab ntsa thinner ntau dua li cov hlab ntsha thiab hauv qab tsawg dua siab.
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Puas yog txoj hlab ntsws tsuas yog cov leeg leeg uas nqa cov ntshav oxygenated?
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Cov hlab ntsws yog lub luag haujlwm nqa cov ntshav oxygenated los ntawm lub ntsws rov qab mus rau sab laug atrium ntawm lub plawv. Qhov no sib txawv ntawm cov leeg ntshav los ntawm lwm cov leeg hauv lub cev, uas tau siv los nqa cov ntshav deoxygenated los ntawm lub cev tag nrho rov qab mus rau lub plawv. Cov no nqa ntshav los ntawm lub ntsws txoj cai
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Kev nkag mus yog qhov txhaws ntawm qhov chaw nrog dej (mob ntsws ntsws), ua rau cov qog ua kua (cov qe dawb lossis cov pus, cov protein thiab cov tshuaj tiv thaiv kab mob), lossis cov cell (cov hlwb tsis zoo, cov qe liab lossis cov ntshav hauv lub cev) uas ua rau thaj tsam ntawm lub ntsws thiab ua rau pom kev pom ntawm nce cov nqaij mos ntom ntom
Puas yog tag nrho cov hlab ntsha nqa cov ntshav oxygenated thiab cov leeg nqa cov ntshav deoxygenated?
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Cov hlab ntsha ua ib feem ntawm lub circulatory system. Cov hlab ntsha nqa cov ntshav oxygenated tawm ntawm lub plawv mus rau cov ntaub so ntswg, tshwj tsis yog cov hlab ntshav hauv lub ntsws, uas nqa ntshav mus rau lub ntsws rau cov pa oxygen (feem ntau cov leeg ntshav nqa cov ntshav deoxygenated mus rau lub plawv tab sis cov leeg hauv ntsws nqa cov ntshav oxygenated ib yam)
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Piav qhia: Txhua qhov chaw ntawm nplooj ntoo muaj qee tus nqi ntawm stomata rau kev tswj cov pa pauv rau cov duab ci. Txawm li cas los xij, cov kab mob qis qis (sab hauv qab ntawm nplooj) muaj ntau dua, vim tias nws feem ntau nyob hauv qhov ntxoov ntxoo thiab yog li nws txias dua, uas txhais tau tias kev nqus dej yuav tsis tshwm sim ntau dua
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Txawm li cas los xij, opioid cuam tshuam txog kev qaug dab peg hauv cov neeg mob qaug dab peg lossis lwm yam mob uas yuav txo qis qhov pib qaug dab peg tau piav qhia hauv cov ntawv sau; tshwj xeeb, oxycodone tau cuam tshuam nrog qaug dab peg hauv tus neeg mob uas mob raum tsis ua haujlwm. Ntawm kev txiav tawm ntawm kev kho oxycodone, qaug dab peg daws