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所有PPT内容的翻译，相关标题未进行翻译，请知悉，翻译参考如下，如有不周请谅解：1.increased susceptibility to many diseases.1.提高了了许多疾病的易感性。2.Functional bone marrow reserves are reduced, with delayed response to blood loss or hypoxia.2。减少骨髓储备功能，延迟失血或缺氧反应。3. Reflux esophagitis.3。反流性食管炎。4.Renal mass and function decline.4肾质量和功能下降。1. It is difficult to isolate the impact of age alone on the cardiovascular system, since age increases risk for hypertension, coronary artery disease, and a more sedentary lifestyle.1。这是很难说年龄单独对心血管系统的影响，因为随年龄的增长而增加患高血压，冠状动脉疾病的风险，还有久坐不动的生活方式。2. There is an age-related decrease in maximum heart rate, as well as the compensatory response of left ventricular ejection fraction to exercise. The annulus of both the aortic and mitral valve thicken, with development of valvular calcific deposits.2。存在最大心率与年龄相关的下降趋势，以及左室射血分数行使代偿反应。无论是主动脉瓣和二尖瓣增厚的环，都伴随着心脏瓣膜钙化沉积的进行。1.About one-third of surface area per volume of lung tissue is lost over the life span, with increase in anatomic dead space increases and decrease in functional reserves.1。大约三分之一的表面积肺组织体积超过寿命损失，伴随解剖死腔增加和减少功能储备两者的提升。2. Age increases the alveolar-arterial (A-a) oxygen gradient, more marked in the supine than sitting position. Cough is less vigorous in the older person and mucociliary clearance is slower.2。年龄的增加肺泡动脉氧梯度（A-A），仰卧比坐位更明显。老年人的咳嗽比较无力和粘液纤毛清除功能减弱。3. The chest wall also changes with age; increased stiffness of the chest wall predominates over an increase in compliance of the lung parenchyma.3。胸壁也随着年龄的变化；胸壁的僵硬度增加超过在肺实质性增加。4. The decrease in arterial PO2 (PaO2) may not be linear, but appears to decline from age 30 until 70 or 75, and thereafter remains almost constant.4。在动脉血氧分压的降低（PaO2）趋势可能不是线性的，但好像从30岁到70或75出现下降，然后几乎保持不变。1. Aging changes in the genitourinary system increase the older persons risk of urinary incontinence.1。在泌尿生殖系统的衰老变化是增加了老年人的尿失禁的危险。2. Urinary tract infection, erectile dysfunction, and dyspareunia.2。尿路感染，勃起功能障碍，和性交疼痛。1. With aging, muscle mass decreases in relation to body weight, leading to impaired motility and b