QON AYLANISH SISTEMASI
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Yurak qisqarish chastosi deb nimaga aytiladi?
Bir minut davoida yurakning qisqarib bo'shashishlari soni deb yurak qisqarish chastotasi deb ataladi.
Shifokorlar yurak urishini tekshirish uchun ________ deb ataladigan asbobdan foydalanadi.
Stetofonendoskop
O'rta yoshli odamning yuragi bir minutda 65-80 marta, bolalarning yuragi esa bunga nisbatan ____ uradi.
Ko'proq
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