4)扁形动物门（涡虫、血吸虫) 日本血吸虫 Tuberculate 毛、胞(2)、雷、尾 tegumen of male 钉螺 Female in Male oral sucker Male ventra sucke Female genital pore Female ventral sucker Female oral sucke 4)扁形动物门（涡虫、血吸虫）