MT-64 日本AV ysiology is the study of how blood flows through the body. The heart is actually two pumps that pump blood throughout the body. The right side of the heart pumps blood to the lungs, while the left side of the heart pumps blood to the rest of the body. The heart is composed of four chambers: the right atrium, the right ventricle, the left atrium, and the left ventricle. The right atrium receives blood from the body and sends it to the right ventricle. The right ventricle pumps blood to the lungs. The left atrium receives blood from the lungs and sends it to the left ventricle. The left ventricle pumps blood to the body. blood flow throughout the body is measured by the heart rate. The average heart rate is 70 beats per minute. The heart rate is affected by factors such as age, activity level, and blood pressure. - 免费预告片中文字幕 srt。

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