a) k o ‘ric h a k (5 — 7 s m );
b) k o ‘tarilu v ch i c h a m b a r i c h a k (1 8 — 20 sm );
d ) k o ‘n d a la n g c h a m b a r i c h a k ( 3 0 —4 0 sm );
e) tu s h u v c h i c h a m b a r i c h a k (1 0 — 15 sm );
0 S - s i m o n ic h a k ;
g) t o ‘g ‘ri ic h a k (1 5 — 20 sm ).
OgNz b o lsh lig ‘i a ’zolari s is te m a n in g b o s h l a n g ‘ich q ism i boMib,
o v q a t s h u jo y d a m e x a n i k q a y ta is h la n a d i va q iz ilo ‘n g a c h orq a li
m e ' d a g a o ‘t k a z i l a d i . C h a y n a s h j a r a y o n i d a o v q a t s o ‘la k b ila n
h o ‘l l a n a d i , m a y d a l a n a d i , s o ‘l a k f e r m e n t l a r t a ’s i r i d a o v q a t
tark ib id ag i ug lev o d lar, sh u y ern i o ‘z id a n singishi b o s h la n a d i. O g ‘iz
b o ‘sh lig ‘id a q u lo q o ld i b ez i, j a g losti b ez i, tilosti bez i b o ‘lib, o ‘zlari
ajra tib c h iq a r a y o t g a n suyuqligi b ila n o v q a t h a z m qilish j a r a y o n i d a
q a t n a s h a d i .
H a lq u m o g ‘iz b o ‘shlig‘ining bevosita d a v o m i b o i i b , u n in g shakli
v o r o n k a g a o ‘xshaydi. H a lq u m n i n g u z u n a s ig a k e tg a n va k a tta la r d a
12— 15 sm keladigan b o ‘shlig‘in in g ustki y a r m id a t o m o q d a n h a lq u m
orq a li o v q a t lu q m a g a va suyuqlik q izilo ‘n g a c h g a o l a d i .
Q iz ilo ‘n g a c h h a l q u m n i n g b e v o sita d a v o m i b o i i b , u m e ’d a g a
d a v o m e ta d i. Q iz ilo ‘n g a c h n in g asosiy vazifasi lu q m a va su y u q lik n i
m e ’d a g a o l k a z i s h d i r . Q i z ilo ‘n g a c h u c h b o l i m d a n iborat: y u q o ri
b o ‘yin sohasi, o ‘rta e n g u z u n s o h a va pastki e n g q isqa so h a . U c h
fiziologik to ra y g a n q ism i — b o s h la n is h q is m id a , o ‘rta q is m id a va
m e ’d a g a o ‘ta d i g a n j o y id a jo y la s h g a n .
Q i z ilo ln g a c h m u s k u lla r in in g y u q o ri q is m id a g i m u s k u l tolalari
f u n k s i o n a l j i h a t d a n h a l q u m m u s k u l l a r i g a o ‘x s h a b o d a m n i n g
x o h ish ig a m u v o fiq q is q a ra d i, pastki silliq m u s k u lla r x o h ish ig a itoat
q ilm a y d i. T a s h q i q a vat ini hosil qilu v ch i m u s k u l la m i n g qisqarishi
q iz ilo ‘n g a c h n i k e n g a y tirsa , ichki q av a t m u s k u lla r in in g qisqarishi
u n i to ra y tira d i va l u q m a n i n g y oki su y u q lik n in g p a stg a y o ‘nalish in i
osonlashtiradi.
Q iz ilo ‘n g a c h o ‘ng va c h a p
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