What is the fate of embryoblast cells in the blastocyst?

Embryoblast cells in the blastocyst are crucial for the development of the embryo. These cells, also known as the inner cell mass, have the potential to differentiate into various cell types that will ultimately form all the tissues and organs of the developing organism. As the blastocyst implants into the uterine wall, embryoblast cells begin to undergo differentiation, leading to the formation of the embryonic layers: ectoderm, mesoderm, and endoderm, which are essential for the development of the body plan and organ systems.

In contrast, the other options do not accurately represent the fate of embryoblast cells. The placenta is primarily formed from trophoblast cells, which are the outer layer of the blastocyst, rather than from the embryoblast. Neoplasms refer to abnormal growths of tissue, which is unrelated to normal embryonic development, and apoptosis, or programmed cell death, does not typically characterize the fate of embryoblast cells in a healthy developing embryo. Thus, the primary role of embryoblast cells is to contribute to the formation of the organism itself.