414
Yurak (uzunasiga kesilgan).
1 – Fossa ovalis; 2 – Ostium v. cavae inferioris; 3 –
Auricula dextra; 4 – Tm. pectinati; 5 –
Valvula sinus coronarii; 6 – Sinus coronarius cordis; 7 – Valva atrioventricularis dextra (v.
tricuspidalis
a
) cuspis septalis;
b
) cuspis posterior; 8 – Chordae tendineae; 9 – Mm. papillares; 10 –
Myocardium (o‘ng qorincha devori); 11 – Trabeculae corneae; 12 – Lamina visceralis (epicardium);
13 –
Endocardium; 14 – Trabeculae corneae; 15 – Pars muscularis septi interventricularis; 16 –
Myocardium (chap devori); 17 – Mm. papillares; 18 – Chordae tendineae; 19 – Valva
atrioventricularis sinistra (v. mitralis); 20 – Pars membranacea septi interventricularis; 21 – Vasa
cordis; 22 – Septum interatriale; 23 – Ostium v. pulmonalis sinistrae; 24 – V.pulmonalis sinistra; 25
– Ostium v.
pulmonalis dextra; 26 – V. pulmonalis dextra.
Yurakning o‘ng bo‘lmachasi va qorinchasi.
1 – V. cava superior; 2 – Fossa ovalis; 3 – Ostium v. cavae inferioris; 4 – V. cava inferior; 5 –
Valvula v. cavae inferioris; 6 – Valvula sinus coronarii; 7 – Sinus coronarius; 8 – Chordae
tendineae; 9 – Trabeculae carneae; 10 – Apex cordis; 11 – Lamina visceralis (epicardium) pericardii
serosi; 12 – Cavum ventriculi; 13 – Mm. papillares; 14 – Myocardium; 15 – Valva atrioventricularis
dextra (v. tricuspidalis):
a
) cuspis posterior;
b
) cuspis septalis;
c
) cuspis anterior; 16 – Vasa cordis;
17 – Mm. pectinati; 18 – Foramina venorum minimarum; 19 – Limbus fossae ovalis; 20 – Ostium v.
cavae superioris; 21 – Auricula dextra; 22 – Aorta.
415
O‟ng bo‟lmacha
– atrium dextrum. Yurakning o‘ng bo‘lmachasida (devorning
qalinligi 2–3 mm) kubsimon bo‘shliq bo‘lib, chap bo‘lmachadan septum interatriale
(bo‘lmacha to‘sig‗i) bilan ajralib turadi. O‘ng bo‘lmacha bo‘shlig‗ining hajmi uning
oldida joylashgan uchburchak shaklidagi o‘ng qulog‗i – auricula dextra bo‘shlig‗i
bilan ancha kattalashadi. Bo‘lmachaning
ichki sirti, asosan, silliq bo‘lib, quloq
qismida muskul tutamlari bir xil joylashgan taroqsimon muskullar (musculus
pectinati)ni hosil qiladi.
1
O‘ng bo‘lmachaga Yuqori kavak vena – vena cava superior, pastki kavak vena –
vena cava inferior quyiladi. Ana shu ikkala kavak vena quyiladigan teshiklar orasida
(bo‘lmachaning ichki sirtida) bitta do‘ng – tuberculum intervenosum bor. Pastki
kavak venaning pastki qirrasida ingichka burma – valvula venae cavae inferioris
bo‘lib, septum interatriale tomonga yo‘nalib joylashgan. Ana shu burma embrionning
rivojlanish davrida vena qonini o‘ng bo‘lmachadan
oraliq devorda joylashgan
ovalsimon teshik orqali chap bo‘lmachaga, so‘ngra esa ostium atrioventriculare
sinistrum orqali chap qorinchaga o‘tish vazifasini bajaradi.
O‘ng bo‘lmachaga kavak venalardan tashqari, Yurakning o‘ziga xos vena
qonini yig‗adigan sinus – sinus coronarius cordis
va birmuncha mayda vena
teshikchalari – foramina venosum minimarum (thebesii) ochiladi. Sinus coronarius
cordis ning bo‘lmachaga ochiladigan joyida endokarddan hosil bo‘lgan valvula sinus
coronarii (thebesii)ni deyarli hamma vaqt ko‘rish mumkin.
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