The first air-breathing fish and amphibians extracted oxygen using gills when in the water and primitive lungs when on land-and to do so , they had to be able to close the glottis , or entryway to the lungs , when underwater .
Importantly , the entryway ( or glottis ) to the lungs could be closed .
通入肺的入口通道(或者腮)可能被关闭了,这一点很重要。
The tico times reports that the 35000-seat stadium hosts two giant television screens , three levels of seating , office buildings , a small sports museum , a hotel , banquet hall and an extravagant staircase serving as the southern entryway .