一、教材分析和处理方案排泄有3条途径：排汗、呼气和排尿。前两条途径在前面相应的章节已提到．在这里再次提出，有利于学生对排泄这个概念的完整理解，不致于误解为排泄一排尿。排尿是最主要的一条排泄途径。要能很好地理解排尿这条途径，必须先弄清楚泌尿系统的结构，而肾脏 First, the analysis of teaching materials and treatment plan There are three ways to excrete: perspiration, exhalation and urination. The first two ways have already been mentioned in the previous corresponding chapters. Here again, it is helpful for students to have a complete understanding of the concept of excretion and not misunderstand to excrete a row of urine. Urination is the most important excretion route. To understand this route of urination well, you must first understand the structure of the urinary system, and the kidneys