WORK OF THE HUMAN HEART. The human

WORK OF THE HUMAN HEART. The human heart contract from the first moment of life till the last. Reduction of the heart pumps blood through the arteries to all parts of the body. Physiology found that adult heartbeat ranges from 60 to 72 beats per minute. Children have a much higher rate of heartbeats. Research has found that the rate of heart rhythm increases depending on different emotions. Each heart beat is accompanied by a rest period. Each contraction and relaxation period of cardiac cycle. Each cardiac cycle consists of three phases: the first phase short cuts atrial systole, the second phase of a longer-term reduction in ventricular Systole. The rest period is called diastole. Research many physiologists evaluated the role of the ventricles as main pump of the human heart.

Результаты (узбекский) 1:

INSON QALB ishini. O'tgan qadar hayotining birinchi kundan boshlab, inson qalbi shartnoma. yurak kamaytirish tanasining barcha qismlari uchun arteriyalar orqali qon haydaydi. Fiziologiya minutiga 60 72 otim dan deb kattalar hayajon intervallarni topildi. Bolalar yurak bir ancha yuqori darajasi bor. Tadqiqot yurak ritmi ortadi darajasi turli his-tuyg'ular qarab, deb topdi. Har bir yurak beat bir dam davr bilan birga bo'ladi. yurak tsikli Har qisqarishi va dam davri. Har bir yurak tsikli uch bosqichdan iborat: birinchi bosqichi qisqa atriyal sistol, qorincha sistol bir uzoq muddatli kamaytirish ikkinchi bosqichini kesadi. Qolgan davri diyastol deyiladi. Tadqiqot ko'p psixologlar inson qalbining asosiy nasos kabi qorincha rolini yuksak baho berdi.