The acrosome in the head was spheral in shape, and there was only one mitochondria in the mature sperm.

核染集成团块状，中部不发达，线粒体融合成1个环绕中部。

Block copolymers have rich phase behavior,and in the bulk they can microphase-separate to form spheral,cylindrical,bi-continuous or layered structure.

段共聚物有着丰富的相行为,在本体中会发生微相成球、柱、双连续和层状结构。