Fluid Lacrimal - yintoni na nokuba yintoni na?

indoda Modern uyazi okuninzi malunga nokusebenza yomzimba wakhe. Kodwa ke kubalulekile ukukhumbula ukuba kukho amalungu amancinane kunye kwamadlala ukongeza kwi Iindlela ezinkulu ebalulekileyo. Bona ibekwe wonke umzimba yaye badlale indima ebalulekileyo impilo yomzimba. Umzekelo zizelwe, apho urhulumente yomsebenzi ixhomekeke esweni.

Yintoni intsimbi?

Ndlala ebizwa umzimba, nto leyo ubunjwe iiseli secretory. Isetyenziswa ukuveliswa kwezinto ezithile imichiza nature ezahlukeneyo. Iron njani imveliso eyenziweyo ngasese okanye umahluko kwindawo yangaphakathi ephilayo. Ngokomzekelo, la maqumrhu kunokubangela imijelo lacrimal yabantu, namadlala yonyango, injeke.

Imizimba sizakhele yimfihlo, ebizwa exocrine. Namadlala, ve imfihlelo kuhlanganiswa yangena egazini okanye inkqubo emithanjeni, ebizwa yonyango.

glands Lacrimal womntu. indawo

Ukufuna lacrimal ndlala kufuneka ibe ngaphantsi nje edge eliphezulu-engaphandle kwezisekelo iliso. Ngokukodwa kwabo, kwasekwa fossa lacrimal kwi elitywinwe kuyaphi kwi ithambo ngokungqalileyo. Ukuze isinyithi nokushukuma, kukho zingamakhamandela ezinezikhondo, oko kukuthi, ukuxhasa izihlunu iliso iinkophe, ukugcwalisa zaqhubeka okunamafutha kwithishyu. Kwi-avareji, umntu omdala, la maqumrhu ube neempawu 10h20h5 mm. Oko: Umlinganiseli akukho ngaphezu kwesinye yentsimbi 0.8 g

isakhiwo

Ngokutsho kulwakhiwo lwalo nobubovu lacrimal alveolar-tubular. It iqulathe isithinzi ezimbini ukungalingani:

• Orbital, apho ingabekwa phezulu kwaye umthamo kancinane ngakumbi;
• palpebral, ekuthiwa esithinzini asezantsi.

Phakathi izabelo, nto leyo yenziweyo ulwelo lacrimal, oko umsipha ifascia elijongene nokuphakamisa ijwabu eliphezulu. Ukususela nganye kuzo 5-6 imibhobho. Ngokuthe ngcembe, baya kuhlanganiswa zibe flow enkulu enye.

Inxalenye esezantsi ingaba unalo esangweni. Ngokusebenzisa kwazo imithambo kunye imithambo unikeze umzimba kunye negazi, neempahla nkovu kunye nomhlaza duct ephambili, apho zonke zizelwe amancinci livuma. Le mithambo we bile evulekileyo, conjunctiva. imveliso yalo phezu umphandle, malunga-5 mm ukusuka kwindawo ekupheleni ijwabu eliphezulu. Ngamanye amaxesha akukho kukhululeka elingaphezulu phecana excretory. Ezi imibhobho ezincinane kwakhona zigcine phezu kwentungo yenqaba leyo conjunctiva. Amanye amajelo fluid iinyembezi zixhonyiwe kwinxalenye nezenyama le conjunctiva, amanye - kule canthus engaphandle. Xa umntu ofihla amehlo akhe, iinyembezi lihla ngohlangothi esingasemva iinkophe, apho umsinga iinyembezi, yaye ngenxa namachibi ekhala nasemingxunyeni encinane emaphethelweni iinkophe.

Ye bile eliphezulu, ehamba ecaleni emhadini ithambo iliso socket, ebizwa ngokuba sac lacrimal. iindonga zaso enokwenza ukuba ngeendlela ezininzi aqukuqela apho kulwelo ukukrazuka.

Inxalenye engezantsi nobubovu lacrimal ilele subaponevroticheskom isabelo phantsi ijwabu asezantsi. It iqulathe lobules ezininzi kokuxhuma. Zisoloko iziqwenga 25-30. Zonke evela imibhobho ye lobules zixhonyiwe le ndlala engundoqo.

Xa ithambo ngokusebenzisa udonga olungaphandle umngxuma ngeempumlo udlula kufutshane nasolacrimal duct. Le channel slezovyvodyaschy ivula kungena ngeempumlo em- slot ekhethekileyo emazantsi esinkini. Ivelufa noqhoqhoqho uyafundiswa ukusuka emphethweni mucosal.

imisebenzi

Amadlala lacrimal bavelise mfihlelo ulwelo inemisebenzi:

• ukususwa izidumbu iliso kunye nokungcola angaphandle;
• ukukhuselwa omiswe komhlaba;
• ukunikwa izakhamzimba inwebu kunye conjunctiva;
• refraction yokukhanya;
• ukuthambisa ajikeleze ngokuba intshukumo kwenkulungwane;
• ukhuselo antibacterial.

Yintoni iinyembezi?

fluid Lacrimal - a transudate ngokucacileyo ukuba isuke kwi (protein) serous ukuqanda. Le khemikhali Ukubunjwa iinyembezi wabona lingqamane nokwakheka igazi. Noko ke, xi potassium le asidi ephakamileyo umxholo fluorine nolusezantsi organic. Le khemikhali Ukubunjwa iinyembezi ekhathalayo isimo umzimba kwaye ezihlala ziguquka.

Isiseko kulwelo ukukrazuka - amanzi. It ityuwa zichithakala (1,5% NaCl), albumin (0.5%), yencindi yomlomo. Kuphando liveza indlela awana. Iinyembezi kuba reflex nangokweemvakalelo. Kwimeko yokuqala, umzimba usebenzisa ukwaba iinyembezi imanzise usule iliso. Kwimeko yesibini - zisulu uxinezeleko. iiseli Secretory kwamadlala lacrimal bavelise imali encinane into psychotropic, okwaziyo ukuzisa isiqabu kwiimeko uxinezeleko. Xa imo lithemba xa iinyembezi kuvela iihomoni uxinzelelo prolactin leytsinenkefalin. iinyembezi Banoyolo ukunciphisa isixa iadrenaline, leyo kunyusa xa overexcitation. Ngaphezu koko, iiseli secretory enikwe phambi ukukrazuka fluid of immunoglobulins kunye neeproteni amaninzi, ii-asidi acid, iiarhente enzyme, urea kunye nezinye izinto imichiza.

Kuba ngoku ethile ingcamango ntoni na ulwelo ukukrazuka, uqonde - ukukwazi ukukhala kubaluleke kakhulu ukuba abantu. Iinyembezi - umqondiso nje kuphela imvelaphi ophezulu ngokweemvakalelo, kodwa nomncedisi kwamehlo ethu, ziphilile.