;</span>in <span  title="" class="an ">&ensp;</span>mice <span  title="" class="an ">&ensp;</span>Respiration <span  title="" class="an ">&ensp;</span>in <span  title="" class="an ">&ensp;</span>vertebrates <span  title="" class="an ">&ensp;</span>is <span  title="" class="an ">&ensp;</span>generated <span  title="" class="an ">&ensp;</span>by <span  title="" class="an ">&ensp;</span>a <span  title="" class="an ">&ensp;</span>compact <span  title="" class="an ">&ensp;</span>network <span  title="" class="an