Video: Cov hlab ntsha puas muaj ntshav?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Qab haus huv yog ntshav siab
Qab haus huv yog cov nqhis dej tsis txaus ntseeg, thiab haus 20% ntawm lub cev tag nrho cov pa khoom txawm tias lawv tsis txaus ntseeg tsuas yog 2% ntawm lub cev qhov hnyav. Qab haus huv xav tau tsis tu ncua khoom ntawm ntshav thiab pib poob hauj lwm sai sai nrog oxygen deprivation
Yog li ntawd, cov hlab ntsha puas muab cov hlab ntsha?
Cov hlab ntsha thiab paj hlwb yog cov txheej txheem sib dhos uas taug kev ua ke mus rau khoom yuav luag txhua cov ntaub so ntswg hauv lub cev. Cov hlab ntsha yog tsim los ntawm cov kab mob hauv lub cev thiab qee zaum pericytes lossis cov leeg nqaij-du; paj hlwb muaj ntawm paj hlwb axons thiab txhawb nqa Schwanncells.
Ib yam nkaus, dab tsi yog cov khoom siv paj hlwb? Ntshav thiab cov hlab ntsha . Cov cov hlab ntsha rau lub plab yog muab los ntawm ob qho tib si parasympathetic thiab sympathetic divisions ntawm autonomic tshee lawv. Theparasympathetic paj hlwb fibers yog nqa nyob rau hauv vagus, los yog 10th cranial, paj hlwb.
Ib sab ntawm qhov no, puas yog cov neurons xav tau ntshav?
Cov ntshav maj nroos mus rau thaj chaw muaj zog txhawm rau muab tua neurons nrog cov pa oxygen thiab qabzib lawv xav tau hluav taws xob.
Cov hlab ntsha cais li cas?
Qab haus huv yog categorized rau hauv peb, thawj pab pawg raws li cov kev taw qhia ntawm lub teeb liab kis tau tus mob nyob rau hauv lub paj hlwb. Tsis nyiam paj hlwb ua cov cim qhia los ntawm kev hnov qab neuronsto rau hauv nruab nrab lub paj hlwb, piv txwv li los ntawm cov kws kho tshuab cov neeg nkag mus rau hauv.
Pom zoo:
Hom hlab ntshav twg txuas cov hlab ntsha thiab cov hlab ntshav?
Hom hlab ntsha Capillaries yog feeb nyias-walled hlab ntsha uas txuas cov hlab ntsha thiab venules; Nws yog los ntawm cov capillaries uas cov as-ham thiab cov pov tseg tau pauv ntawm cov ntshav thiab cov ntaub so ntswg ntawm lub cev
Cov hlab ntsha hlab ntsha thiab cov hlab ntshav muaj dab tsi?
Cov hlab ntsha nqa ntshav tawm ntawm lub plawv; Lub ntsiab hlab ntsha yog aorta. Capillaries nqa ntshav tawm ntawm lub cev thiab pauv cov as-ham, pov tseg, thiab oxygen nrog cov ntaub so ntswg ntawm qib cellular. Cov leeg ntshav yog cov hlab ntshav uas coj cov ntshav rov qab los rau hauv lub plawv thiab tso ntshav tawm ntawm cov kabmob thiab cov ceg
Puas yog Neuroglia tsim cov hlab ntsha hauv cov hlab ntsha hauv nruab nrab cov hlab ntsha?
Muaj plaub hom neuroglia pom nyob hauv nruab nrab lub paj hlwb: Astrocytes - tswj cov ntshav lub hlwb teeb meem thiab khaws cov tshuaj ib puag ncig los ntawm kev siv cov ions rov qab thiab cov tshuaj xa xov mus rau lub cev. Oligodendrocytes - myelinate axons nyob rau hauv lub hauv nruab nrab lub paj hlwb thiab muab tag nrho cov txheej txheem txheej txheem
Vim li cas peb thiaj sau cov ntshav los ntawm cov hlab ntsha thiab tsis yog los ntawm cov hlab ntsha?
Cov leeg yuav tsum tau li qub kom cov ntshav ntws mus rau lub plawv. Theses li qub yog qhov tshwj xeeb hauv ob txhais ceg thiab caj npab. Lawv tawm tsam lub ntiajteb txawj nqus los tiv thaiv cov ntshav rov qab los. Cov hlab ntsha tsis xav tau li qub vim tias lub siab los ntawm lub plawv ua kom cov ntshav ntws los ntawm lawv mus rau ib qho
Puas yog cov hlab ntsha uas muaj oxygenated ntshav lossis cov hlab ntsha?
Cov hlab ntsha tau pom tias yog nqa cov ntshav oxygenated mus rau cov ntaub so ntswg, thaum cov leeg nqa cov ntshav deoxygenated rov qab mus rau lub plawv. Txawm li cas los xij, hauv txoj hlab ntsws, cov hlab ntsha nqa cov ntshav deoxygenated los ntawm lub plawv mus rau lub ntsws, thiab cov hlab ntshav rov qab ntshav los ntawm lub ntsws mus rau lub plawv