The cells of this cluster inside next to the fluid filled cavity is a region of the blastocyst called the inner cell mass.

而这簇细胞的内侧,毗邻于充满液体的空腔的一侧,这些细胞在囊胚中称为内群细胞

耶鲁公开课 - 生物医学工程探索课程节选

There are different kinds of cell walls in bacteria but they have a rigid cell wall and our cells don't have a rigid cell wall, we have a fluid lipid like cell wall.

细菌有不同种类的细胞壁,但都很坚固,人类细胞没有坚固的细胞壁,我们有一层类似细胞壁的流动的脂类

耶鲁公开课 - 生物医学工程探索课程节选