Lacrimal kua - dab tsi nws yog ib thiab yog dab tsi?

Niaj hnub nimno tus txiv neej paub ntau yam txog cov hauj lwm ntawm nws lub cev. Tab sis nws yog ib nqi nco ntsoov hais tias muaj me me nruab nrog cev thiab qog nyob rau hauv tas li ntawd mus rau lub loj tseem ceeb heev systems. Lawv nyob thoob plaws hauv lub cev thiab ua si ib tug tseem ceeb luag hauj lwm nyob rau hauv lub zuag qhia tag nrho noj qab haus huv ntawm lub cev. Ib qho piv txwv yog lub kua muag ducts, los ntawm cov uas lub xeev ntawm cov ua hauj lwm nyob rau hauv lub qhov muag.

Yuav ua li cas yog hlau?

Caj pas hu ua lub cev, uas yog tsim los ntawm cov secretory hlwb. Nws yog siv rau zus tau tej cov kev tshuaj sib txawv ntawm cov tshuaj xwm. Hlau yuav tso zis generated daim card los yog outwardly nyob rau hauv lub internal ib puag ncig ntawm ib tug kab mob. Raws li ib qho piv txwv, cov lub cev muaj peev xwm ua rau tib neeg lacrimal raws, endocrine qog, pancreas.

Lub cev hlais tawm ib daim card, hu ua exocrine. Qog, ua tau ib daim card tsim rau hauv cov hlab ntsha los yog lymphatic system, hu ua endocrine.

Lacrimal qog ntawm tus txiv neej. qhov chaw

Nrhiav lacrimal caj pas yuav tsum cia li hauv qab no lub qaum-txheej ntug ntawm lub qhov muag socket. Tshwj xeeb tshaj yog rau lawv, tsim lacrimal fossa nyob rau hauv ib tug ntiav so nyob rau hauv lub frontal pob txha. Yuav kom hlau tsis txav, muaj fibrous bands, uas yog, cov yuav txhawb cov nqaij ntshiv ntawm lub qhov muag thiab tawv muag daj, ntxiv lawv khaws cia fatty cov ntaub so ntswg. Nyob rau nruab nrab, ib tug neeg laus, cov lub cev muaj qhov ntev 10h20h5 hli. Nws nyhav tsis muaj ntau tshaj li ib tug hlau 0.8 g

qauv

Raws li nws cov qauv lacrimal caj pas alveolar-tubular. Nws muaj ob teej lobes:

• orbital, uas yog nyob rau saum thiab hauv lub ntim ib tug me ntsis ntau;
• palpebral, uas yog hu ua tus qis lobes.

Ntawm shares, uas yog ua los ntawm cov lacrimal kua, nws yog ib lub fascia nqaij lub luag hauj lwm rau lifting lub sab sauv daim tawv muag. Los ntawm txhua tus ntawm lawv mus 5-6 ducts. Maj mam, lawv cov chav hauv ib tug loj txaus.

Lub sab ib feem ntawm lub caj pas muaj ib tug qhov rooj. Los ntawm lawv yog cov hlab ntsha thiab cov leeg uas muab lub cev nrog rau cov ntshav, qog cov hlab ntsha thiab lub ntsiab ciav cancer, nyob rau hauv uas tag nrho cov me kua muag ducts los sib. Lub lumen ntawm lub ciav yog qhib nyob rau hauv lub conjunctiva. Nws tso zis yog nyob rau hauv txheej ib feem, hais txog 5 hli los ntawm lub outermost point ntawm lub sab sauv daim tawv muag. Tej zaum kuj muaj yog ntxiv paug excretory ib ntsuj av. Cov me me ducts kuj mus rau lub ru tsev ntawm lub conjunctiva. Ib txhia kua muag kua raws tso tawm nyob rau hauv lub sab nqaij daim tawv feem ntawm lub conjunctiva, ib co - nyob rau hauv tus txheej canthus. Thaum ib tug neeg muab kaw nws lub qhov muag, kua muag khiav down rau sab nraum qab ntug ntawm lub muag daj, qhov twg lub kua muag ntws, thiab los ntawm tearful pas dej mus rau hauv lub qhov me me ntawm cov npoo ntawm cov tawv muag.

Lub sab sauv duct, taug kev tom ntej no mus rau lub qhov muag socket pob txha taub, hu ua lub lacrimal sac. Nws cov phab ntsa muab sawv mus rau ntau txoj kev los ntawm kev uas ntws lub kua muag kua.

Lub sab ib feem ntawm lacrimal caj pas lus dag nyob rau hauv subaponevroticheskom feem nyob rau hauv lub qis daim tawv muag. Nws muaj heev heev txuas lobules. Lawv yog cov feem ntau yog 25-30 daim. Tag nrho cov los ntawm cov ducts ntawm lub lobules muaj tso tawm nyob rau hauv lub ntsiab caj pas.

Nyob rau hauv cov pob txha los ntawm tus txheej phab ntsa ntawm ntswg kab noj hniav kis ze nasolacrimal ciav. Qhov no slezovyvodyaschy channel qhib mus rau hauv lub qhov ntswg kab noj hniav ntawm ib tug tshwj xeeb qhov nyob rau hauv lub qab ntawm lub dab ntxuav tes. Lub txoj kab txiav valve yog them los ntawm lub mucosal folds.

zog

Lub lacrimal qog tsim ib tug tshwj xeeb kua daim card uas muaj ntau nta:

• tshem tawm ntawm txawv teb chaws lub cev los ntawm lub qhov muag thiab av;
• kev tiv thaiv los ntawm qhuav nto;
• tus me nyuam cov as-ham rau lub cornea thiab conjunctiva;
• refraction ntawm lub teeb;
• lubrication rau lub zog ntawm lub xyoo pua;
• antibacterial tiv thaiv.

Yuav ua li cas yog ib tug tsim kua muag?

Lacrimal kua - ib tug ntshiab transudate uas accumulates nyob rau hauv ib tug serous (protein) kab noj hniav. Cov tshuaj nyob tus yeees ntawm cov kua muag cai coincide nrog nyob tus yeees ntawm cov ntshav. Txawm li cas los, cov poov tshuaj concentration yog siab dua thiab cov fluorine cov ntsiab lus thiab qis organic acids. Cov tshuaj nyob tus yeees ntawm cov kua muag yog teb rau lub xeev ntawm lub cev thiab yog lossi hloov.

Lub hauv paus ntawm lub kua muag kua - dej. Nws yaj ntsev (1,5% NaCl), albumin (0.5%), hnoos qeev. Nyob rau hauv qhov kev tshawb nrhiav nws exhibits me ntsis alkaline ras txog. Kua muag tej zaum yuav reflex thiab lub siab lub ntsws. Nyob rau hauv thawj cov ntaub ntawv, lub cev siv los faib los kua muag rau moisten thiab ntxuav lub qhov muag. Nyob rau hauv lub thib ob cov ntaub ntawv - los daws nro thiab ntxhov siab vim. Secretory hlwb ntawm lub lacrimal qog tsim ib tug me me npaum li cas ntawm ib tug psychotropic tshuaj, muaj peev xwm txog kev nqa nyem nyob rau hauv kev nyuaj siab ntau zaus. Nyob rau hauv ib lub xeev ntawm tag kev cia siab nyob rau hauv lub kua muag yuav tshwm sim kev nyuaj siab cov tshuaj hormones thiab prolactin leytsinenkefalin. Zoo siab kua muag txo tus nqi ntawm cov adrenaline, uas tsub kom dramatically thaum overexcitation. Ntxiv mus, secretory hlwb muab nyob rau hauv cov kua muag kua xub ntiag ntawm immunoglobulins thiab heev heev cov nqaijrog, amino acids, enzyme agents, urea thiab lwm yam tshuaj hais.

Vim hais tias tam sim no koj ib lub tswv yim dab tsi cov kua muag kua, koj to taub - muaj peev xwm quaj yog qho tseem ceeb heev rau tib neeg beings. Kua muag - tsis yog ib tug kos npe rau ntawm siab lub siab lub ntsws tom qab, tab sis kuj pab ntawm peb ob lub qhov muag, kom lawv noj qab nyob zoo.