The Third and Longest Period of Prenatal Development, Extending from the Ninth

question 587

Multiple Choice

The third and longest period of prenatal development, extending from the ninth week until birth, is called the:

• A) fetal period.
• B) germinal period.
• C) zygotic period.
• D) embryonic period.

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Definitions:

Embryo

An early stage of development in multicellular organisms, in humans, it refers to the period from fertilization until the end of the eighth week of gestation.

Mitosis

A process of cell division that results in two genetically identical daughter cells from a single parent cell.

Ovum

A female reproductive cell, or egg, that when fertilized by a sperm, can develop into a new organism.

Sperm

The male reproductive cell or gamete, which is capable of fertilizing a female's ovum to produce offspring.