This reduced body cavity is called a hemocoel . 这种缩小的体腔称为血腔。
2.
The mechanism enhancement of the optical brightener is not known . shapiro et al . postulated that selected brightener including m2r inhibit or alter the chitinous peritrophic membrane ( pm ) , creating gaps in the membrane or gut lining and perhaps allowing more virions to pass from the gut lumen into the hemocoel 光增白剂对杆状病毒的增效作用的机理存在两种推测一种观点认为光增白剂是通过破坏围食膜结构的完整性，促使更多的病毒粒子穿越围食膜而发动感染的；另一种意见认为光增白剂能延迟中肠上皮细胞的脱落，促进病毒的复制繁殖。
