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VENA

venaVENA (Vena, Phlebus), varid, siyohrag, rage, ki ba tavassuti on khun ba dil meguzarad. Az V.-hoi davri kaloni khungardish khune, ki az gazi karbonat, mahsuli mubodilai moddaho, gormonho va g. ser gashta, az uzvhoi gunoguni badan jam shudaast, ba peshdili rost meravad. V.-hoi davri khurdi khungardish boshand, khuni az oksigen sershudaro ba peshdili chap merasonand. Ibtidoi sistemai V.-ho shabakai murag (kapillyar)-ho ast. Dar on jo avval venachaho tashakkul yofta, minbad ba V.-hoi miyona va kalon mubaddal meshavand.
Devorai V. nazar ba devorai arteriya nozuk va chandir ast. Fishori khuni V. khele past (dar V.-hoi kalon hatto az fishori atmosferi ham pasttar) meboshad. Harakati qafasi sina, junbishi diafragma, kashish khurdani mushakho baroi dar V. gardish kardani khun kumak merasonand. Dar V. klapanho mavjudand, ki hangomi boz shudani onho khun faqat ba dil dokhil megardad.
V.-i yugi, V.-i shush, V.-i bobi (daromadgohi), V.-i kholii bolo, V.-i kholii poyon, V.-i tihigoh, V.-i ron, V.-i zeri zonu, V.-i kaloni zeri pusti po, V.-i khurdi zeri pusti po az jumlai V.-hoi asosii organizm mahsub meshavand. Sokhtor, faoliyat va tashkhisu muolijai bemorihoi V.-horo flebologiya meomuzad.
KL
Venai tihii poyon va shokhahoi on.
1 – venai kitfusarii chap; 2 – kamoni aorta; 3 – tanai shush; 4 – venai diafragmavii poyon; 5 – venai sipurz (burida shudaast); 6 – venai gadudi boloi gurdai chap; 7 – venai gurdai chap; 8 – venai umumii tihigohi chap; 9 – venai darunii tihigohi chap; 10 – venai berunii tihigohi chap; 11 – venai zeripustii kaloni po; 12 – venahoi azoi jinsii beruni; 13 – venai ron; 14 – venai umumii tihigohi rost; 15 – venai tihii poyon; 16 – venai tukhmdoni rost; 17 – venai tukhmdoni chap; 18 – qismi batnii aorta; 19 – venahoi jigar; 20 venai tihii poyon; 21 – venai kitfusarii rost; 22 – venai tahtichanbarii rost; 23 – venai yugii dokhilii rost.

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