Qhov nruab nrab txheej muaj cov hlab ntsha transversely striated leeg, hlab ntsha zog

Txij li thaum qhib nyob rau hauv lub xyoo pua XVII English kws kho mob William Harvey lub foundations ntawm cov kev cai lij choj ntawm lub zog ntawm cov ntshav los ntawm cov hlab ntsha los ntawm science, nws twb pom hais tias lub cev muaj ib tug complex system ntawm conductive ntsiab. Nws yog leeg, hlab ntsha thiab cov hlab ntsha ntawm tus txiv neej. Lawv muaj ib tug tib yam ntxwv txoj kev npaj, raws li thaum lub sij hawm embryogenesis tsim los ntawm ib tug kab txheej - mesoderm. Vim sib txawv nyob rau hauv khiav dej num ua los ntawm ib tug tej hom ntawm cov hlab ntsha, lawv ib co nta ntawm cov qauv. Nyob rau hauv no tsab xov xwm peb yuav tsom rau cov kev thaj chaw ntawm cov hlab ntsha muab kev koom tes nyob rau hauv me me thiab cov loj loj ncig.

Raws li lub tsev arterial phab ntsa

Saj zawg zog, check thiab elastic hlab uas mus los ntawm lub plawv - ib tug tib neeg leeg. Raws li nws cov ntshav mus rau tag nrho cov nruab nrog cev thiab cov nqaij, coj lub hlwb nrog rau oxygen thiab as-ham: qabzib, amino acids, glycerol thiab fatty acids. Ib txhij nws yuav siv sij hawm cov khoom ntawm cellular metabolism, thiab carbon dioxide. Nyob rau hauv tag nrho cov hlab ntsha ntawm lub arterial ntshav tsiv nyob rau hauv siab thiab nyob ib tug txaus siab ceev. Yuav kom lub sam xeeb ntawm cov leeg phab ntsa yuav tsum muaj zog heev. Lawv muaj ib tug peb-txheej qauv, uas peb yuav zoo nyob rau hauv ntau yam.

nrog cov qauv

Peb plhaub ntawm cov hlab: lub txheej, nruab nrab thiab puab, yog qhov sib txawv uas piav lub zog ua los ntawm lawv. Yog li, cov txheej txheej no yog muaj li ntawm xoob connective ntaub so ntswg, paj txoj penetrated. Excitement, dua rau lawv, ua rau ib tug kev hloov nyob rau hauv lub lumen ntawm leeg, uas muaj feem xyuam rau lub Performance index ntawm ntshav siab nyob rau hauv lub nkoj qab thus. Qhov nruab nrab txheej muaj cov hlab ntsha striated fibers thiab tseem muaj ib tug tus tej nqaij. Tsis tas li ntawd lawv yog tam sim no nyob rau hauv cov hlab ntsha connective strands muaj cov protein elastin. Vim lub contraction thiab so ntawm lub npag txheej ntawm cov hlab ntsha lumen hloov. Nws yog cai los ntawm paj fibers ntawm lub autonomic lub paj hlwb. Yog li, lub excitation nyob rau hauv lub sympathetic division ua narrowing ntawm cov hlab ntsha, thiab nyob rau hauv lub parasympathetic - enlarging lawv txoj kab uas hla. Puab txheej receptacles yeej muaj ib tug tshwj xeeb connective cov ntaub so ntswg - endothelium, muaj ib tug heev tus nto thiab muab tagnrho tej yam kev mob rau ndlwg ntawm cov ntshav thereto. Raws li yuav pom, tag nrho cov khaubncaws sab nraud povtseg ntawm cov arterial phab ntsa zoo tshaj plaws ua hauj lwm cov ntshav hloov lwm lub tsev muaj nuj nqi nyob rau hauv siab thiab thaum muaj kev kub ceev.

Xav txog cov tseem ceeb tshaj plaws arterial cov hlab ntsha nyob rau hauv tib neeg lub cev. Cov muaj xws li cov aorta, pulmonary thiab coronary hlab ntsha.

aorta

Raws li cov coob leeg ntawm lub cev, lub aorta emerges ntawm sab laug ventricle thiab yog faib mus rau hauv peb ceg: lub ascending, koov thiab descending ceg. Lawv muab cov ntshav ntawm tag nrho cov hauv nruab nrog cev thiab cov nqaij mos. Lub siab nyob rau ntawd yog 120-150 mm hg. Art. Yuav kom withstand impacts los ntawm tas mus li feem ntawm cov ntshav ntiab tawm los ntawm lub plawv, qhov nruab nrab txheej muaj ib tug haib arterial nqaij, quenching pliaj co thiab conducive rau cov ntshav ncig. Zoo lus aortic phab ntsa yuav ntes lwm probing mem tes nyob rau radial leeg ntawm sab laug lub dab teg. Thinning ntawm cov nqaij txheej, nws tsis elasticity ua rau txoj kev loj hlob ntawm aortic aneurysm - ib tug kab mob loj uas sawv cev rau ib tug kev hem thawj rau lub neej thiab nyob rau hauv thaum ntxov ua sawv tau tsis muaj tseeb tsos mob. Qhov no complicates rau hauv thaum ntxov mob thiab cov kab mob no yuav raug kuaj siv ib txoj kev xws li ultrasound cov hlab ntsha.

koj muaj teebmeem kev ncig

Qaim liab xim, noo nrog cov pa thiab as-ham, arterial ntshav tsiv los ntawm lub plawv los ntawm cov aorta. Ntawm no pib lub mauj ncig. Ntxiv mus, vim lub sib cais ntawm lub aorta rau hauv peb ceg, cov ntshav ntws mus rau lub nruab nrog cev ntawm tag nrho cov physiological systems. Muaj yog tseem me me, yog li ntawd-hu ua pulmonary, vajvoog, starting los ntawm txoj cai ventricle. Los ntawm no los lub pulmonary leeg, uas yog tus npuas alveolar ntsws venous ntshav uas tau raug sau lub Upper thiab qis hollow cov hlab ntsha ntawm lub mauj ncig. Peb yuav tsum nco ntsoov tias nyob rau hauv rau sab xis ntawm lub plawv yog venous ntshav, ib feem ntawm uas yog tso tawm rau hauv lub pulmonary leeg. Siab nyob rau hauv nws kuj heev, txawm hais tias qis dua nyob rau hauv lub aorta.

Qhov nruab nrab txheej muaj myofibrils leeg du nqaij, alternating nrog elastic fiber protein. Nyob rau sab laug thiab txoj cai ceg ntawm lub pulmonary venous ntshav mus rau lub ntsws nyob qhov twg nkev pauv yuav siv sij hawm qhov chaw: carbon dioxide yog tso tawm nyob rau hauv cov kab noj hniav ntawm cov alveoli thiab mus rau hauv cov ntshav diffuses oxygen molecules uas yog kev cob cog rua nrog lub ntsws xim - hemoglobin.

Raws li koj tau pom, lub pulmonary leeg, yog muab kev koom tes nyob rau hauv lub ntsig txog kev, yog venous ntshav mus rau lub ntsws.

coronary hlab ntsha

Lub plawv - ib qho ntawm feem tau-bodied npag lub cev ua hauj lwm rhythmically. Nws muab cov ntshav ntawm lub tag nrho lub cev, tab sis kuj yuav tsum tau kev uninterrupted tau txais daim ntawv ntawm trophic tshuaj thiab oxygen. Mus nqa tawm nws tseem ceeb heev kev ua si ntawm lub cev nws muaj nws tus kheej vascular system.

Nws muaj xws li leeg ceg emanating los ntawm cov thawj feem ntawm lub aorta hu ua noob. Lub qhov ncauj ntawm tus coronary hlab ntsha nyob cia li qab lub aortic valve, uas tsis pub cov ntshav rov qab mus rau hauv rau sab laug ventricle ntawm lub plawv. Los ntawm lub coronary hlab ntsha ib hnub mus txog 500 liters ntawm cov ntshav, qhov no qhia ib tug hnyav load, uas yog kev kawm mus rau ib tug system ntawm cov ntshav mov rau ntawm lub plawv. Qhov nruab nrab txheej muaj cov hlab ntsha npag thiab elastic fibers thiab yog li txoj kev loj hlob ntawm atherosclerosis los yog nyob rau heev cia li spasm yuav tsis elasticity. Wherein lub lumen yog txo, uas provokes tus feem ntawm lub plawv mob necrosis - myocardial infarction.

ntshav siab

Yav tas los, peb pom hais tias nyob rau hauv cov hlab ntsha ntawm cov ntshav mus rau hauv siab thiab thaum muaj kev kub ceev. Ntshav siab yog hais txog kev mob theem: systole thiab diastole, thiab ib txwm vascular laus yog kwv yees li sib npaug zos rau 120/70 hli Hg. Art. Nws yog ntsuas rau ntawm lub siab gauge ntawm lub brachial leeg. Yog hais tias cov phab ntsa hauv cov hlab ntsha nqaim, lawv laus yog nce thiab lub siab yuav tsub kom. Xws li ib tug pathological mob hu ua tawg. Nws ua rau ib tug load ntawm cov kev mob plawv thiab ntshav mov teeb tsis muaj kev kho mob yuav ua rau koj lub plawv nres.

Nyob rau hauv daim ntawv no peb kawm cov qauv ntawm cov hlab ntsha thiab tsim nta ntawm lawv cov hauj lwm nyob rau hauv tib neeg lub cev.