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Blastocoel and blastoderm. The blastula (from Greek Î²Î»Î±ÏÏÏÏ (blastos), meaning sprout) is a hollow sphere of cells, referred to as blastomeres, surrounding an inner fluid-filled cavity called the blastocoele formed during an early stage of embryonic development in animals. blastula is a sphere of cells surrounding a blastocoele. The blastocoele is a fluid filled cavity which contains amino acids, proteins, growth factors, sugars, ions and other components which are necessary for cellular differentiation. The blastocoele also allows blastomeres to move during the process of gastrulation.
In most cases, yes. The hollow blastocystâwhich is where embryonic stem cells come fromâcontains a cluster of 20-30 cells called the inner cell mass. These are the cells that become embryonic stem cells in a lab dish. The process of extracting these cells destroys the embryo. Donât forget that the embryos were donated from IVF clinics.