The exine is composed of tectum, columellae, foot layer and endexine.

花粉外壁由顶、状、底及外壁内所组成。

The tegmentum——tectum——tegmentum connections are only concerned with the mid-dle and deep layers of the superior colliculus.

被—顶—被的联系只与上丘、深有关。

The exine of pollen wall is of different electron density, the nexine dense and the sexine, comprising tectum, bacules, and foot layer, relatively thin.

花粉壁的外壁分为外内，外包括覆、基基足等三，内只包含一。

EPSPs with short latencies were concluded to be monosynaptic.Most IPSPs were generated through polysynaptic paths, but monosynaptic IPSPs were also recorded in the tectum.

短潜时的EPSP可能是通过单突触进行传导的，而大多数的IPSP是通过多突触方式进行神经信息传递的。