Времена группы perfect active. Work of the human heart

Маълумот даражасиОлий таълим
ТавсифThe human heart contracts from the first moment of life until the last. The contractions of the heart pump the blood through the arteries to all the parts of the body. Scientists have determined that the total weight of the blood pumped by the heart is about ten tons. The rate of heart contractions is regulated by two groups of nerve fibres. It varies in different persons and at different age. Physiologists have established that in the adult the heart makes from 60 to 72 beats per minute. In children the rate of heartbeat is much higher. Research work of many scientists has helped to determine that the rate of heartbeat increases depending on different emotions. Each beat of the heart is followed by a period of rest for the cardiac muscle.
ТилРус тилида,Инглиз тилида
Муаллиф Кафедра иностранных языков
Нашр кўриниши Бир марталик нашр
Йўналиши Илмий-таълимий
Нашр этилган йили 2009
Нашриёт Ташкентский педиатрический медицинский институт
Саҳифалар сони 7
УДК рақами
Хато тўғрисида маълум қилиш Транслит