So what exactly is the purpose of cleavage? Well, the purpose of cleavage is to actually partition that zygote into many identical cells so that we can use these identical cells later on as the building blocks to actually form that developing embryo and eventually form that organism, the adult organism. So this is the process of cleavage. Now let's move on to the process known as blastulation. So this structure here, the morala, will continue dividing these individual cells. The blastomirs will continue to divide via mitosis until we form a sphere that consists of hundreds of cells.