Following fertilization and after about 3 days of cell division, the developing organism is considered a ____ as it moves along the uterine tube toward the uterus.

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After about 3 days of cell division following fertilization, the developing organism is a morula. It is a solid ball of cells that is about the same size as the original zygote but with more cells. It moves along the uterine tube toward the uterus. Once the morula reaches the uterus, it undergoes further cell division and forms a blastula, which is a hollow ball of cells. Later, the blastula develops into a gastrula, which has three distinct layers and will eventually form the various tissues and organs of the body. The fetus is the term used for the developing organism after about 9 weeks of gestation.

Following Fertilization and After About 3 Days of Cell Division