tectum

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

花粉外壁由顶盖层、柱状层、底层及外壁内层所组成。

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

被盖—顶盖—被盖联系只与上丘中、深层有关。

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EPSP可能是通单突触进，而大多数IPSP是通多突触方式进神经信息递。

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

花粉壁外壁分为外层和内层，外层包括覆盖层、基粒棒和基足层等三层，内层只包含一层。