2.18 肺泡 The alveoli Alveoli are the sites of gas exchange in the lungs. The alveoli are made of alveolar type I cells, which are simple squamous epithelium. They are thin to permit the diffusion of gases.? The alveoli are surrounded by pulmonary capillaries, which are also made of simple squamous epithelium. Elastic connective tissue between alveoli is important for normal exhalation.? A thin layer of tissue fluid lines each alveolus. This is essential to permit diffusion of gases. Alveolar type II cells produce pulmonary surfactant that mixes with the tissue fluid lining to decrease surface tension to permit inflation of the alveoli. Alveolar macrophages phagocytize foreign material. ??注釋：? ??alveolus /?l?v??l?s; ??lv????l?s/ 肺泡 (復數(shù)alveoli /?l?v??la?; ??lv????la?/) ??site /sa?t/ 地點；位置；現(xiàn)場；發(fā)生地；場所 ??gas exchange /?ɡ?s ?ks?t?e?nd?/ 氣體交換 ??lung? /l??/ 肺 ??alveolar type I cell /?l?v??l? ?ta?p ?w?n ?s?l; ??lv????l?/ I型肺泡細胞 ??simple squamous epithelium /?s?mpl ?skwe?m?s ??p??θi?l??m/ 單層扁平上皮；單層鱗狀上皮 ??diffusion? /d??fju???n/ 擴散；彌散；傳播 ??pulmonary capillary /?p?lm?n?r? k??p?l?r?; ?k?p?l?r?/ 肺毛細血管 ??elastic connective tissue /??l?st?k k??n?kt?v ?t??u?/ 彈性結(jié)締組織 ??exhalation /??ksh??le???n/ 呼氣；呼出 ??layer? /?le??/ 層 ??tissue fluid /?t??u? ?flu??d/? 組織液 ??line? /la?n/ v. (在某物的內(nèi)部)形成一層 ??alveolar type II cell /?l?v??l? ?ta?p ?tu? ?s?l; ??lv????l?/ II型肺泡細胞 ??pulmonary surfactant /?p?lm?n?r? s???f?kt?nt/ 肺表面活性物質(zhì) ??lining /?la?n??/ (身體器官內(nèi)壁的)膜；內(nèi)襯；襯里 ??surface tension /?s??f?s ?t?n?(?)n/ 表面張力 ??inflation /?n?fle??(?)n/ 充氣；膨脹；增大 ??alveolar macrophage /?l?v??l? ?m?kr?(?)fe?d?; ??lv????l?/ 肺泡巨噬細胞 ??foreign material /?f?r?n m??t??r??l/ 異物 2.19 大腸癌篩查 Colorectal cancer screening saves lives. Colorectal cancer can affect anyone, and is most often found in people 50 or older. As more adults get screened, fewer are getting colorectal cancer. Screening can find abnormal growth so they can be removed before turning into cancer, and can find the cancer early, when it's easiest to treat. If you're over 50, talk to your doctor about getting screened for colorectal cancer. ??注釋： ??colorectal cancer? /?k??l???r?kt?l ?k?ns?/ 結(jié)直腸癌；大腸癌 ??screening? /?skri?n??/ n. 篩查 ??affect /??f?kt/ (疾病)困擾(某人)；侵襲；使感染 ??screen? /skri?n/ v.? 篩查；檢查 ??abnormal /?b?n??m(?)l/ 異常的；反常的；不正常的；變態(tài)的 2.20 高血壓 High blood pressure, also called hypertension, means that your blood pressure is consistently higher than the recommended level. Having high blood pressure increases your risk of a heart attack or stroke. It's often called a silent killer as you may not have any symptoms. Nearly 5 million people in the UK don't realise they have high blood pressure. So knowing your blood pressure could save your life. And it's quick, free, and easy to get checked.? ??注釋： ??hypertension? /?ha?p??t?n??n/ 高血壓 ??consistently? /k?n?s?st?ntl?/ 一貫地；始終 ??recommended? /?r?k??m?nd?d/ 被推薦的；建議的；被推崇的 ??stroke? /str??k/ 腦卒中；中風 ??symptom? /?s?mpt?m/ 癥狀；征兆；征候