医用英语选读(十二)(英文)

<正> The chemical activity of cells produces metabolicwaste, which diffuses out of the cells into the tissue fluid and from there into the blood.Cellular activity can continue only if these waste products are removed from the blood, and this is one of the primary functions of the kidney. However, the role of the kidney goes far beyond the more excretion of toxic waste material.The kidney excretes in the urine any substance that becomes present in excess in the plasma, and in this way it guards the constancy of the internal environment. The kidney does not extract substances from the blood for excretion;it     

·医用英语选读·(十三)

<正> It is well known that a diet containing optimal amounts of purified fats, carbohydrates, proteins, minerals, and water cannot support life. Missing from such a diet are the vitamins. Long before the discovery of vitamins, it was recognized that scurvy,     

她在家庭做的医学检查

<正> 去年,一位游览了小市场的32岁的男子回家时买了一只检测粪便中隐血的验血箱.他使用了这个箱子,使他感到震惊的是得到了阳性读数.他立刻去拜访了医生,医生通过进一步检查,发现直肠下端有一块癌性息     

医用英语选读(十)

<正> The main functions of the lung are to supply the body with oxygen and get rid of excess carbon dioxide. In so far as expired air is usually warmer than inspired air and is saturated with water vapour normal respiration is associated with some heat loss. In quiet respiration about 500 ml of air are breathed in and out in each respiratory cycle. If the respiratory rate is about 18 per minute the volume of air entering and leaving thelungs is about 9L per minute. This Can be encreased by deeper and more vapid breathing to 150 L per minute. Slow, deep breathing is much more efficient than rapid, shallow breathing for increasing the amount of oxygen available to the body.     

医用英语选读(十一)

<正> All the cells of the body are equipped with the necessary organelles for carrying on an independent existence. They can provide for their energy needs by oxidizing food material, and they can synthesize the nucleic acids and proteins required for their maintenance and reproduction. They are surrounded by membranees adapted for the intake of oxygen and nutrients. But these are obtainable only from the external environment. Most of the cells of the body have no contact with the external environment. They are entirely dependend upon the transportation function of the circulatory system for supplies of oxygen and nutrients. Again, the cells have no direct contact with the circulating blood, the actual environment     

医用英语选读(九)

<正>蛋白质,或氨基酸,在饮食中是必需的.当细胞使某些蛋白质降解时,并非所有的氨基酸都被再循环成新的蛋白质.有些氨基酸被代谢了,必须从饮食中得到补充.有些细胞死亡了,