The nurse is explaining the process of cell division during the preembryonic period to a group of nursing students. Which describes the morula?
A) Fertilized ovum before mitosis begins
B) Double layer of cells that becomes the placenta
C) Flattened, disk-shaped layer of cells within a fluid-filled sphere
D) Solid ball composed of the first cells formed after fertilization

Question

Quizplus · Accepted Answer

The morula is so named because it resembles a mulberry. It is a solid ball of 12 to 16 cells that develops after fertilization. The fertilized ovum is called the zygote. The placenta is formed from two layers of cells-the trophoblast, which is the other portion of the fertilized ovum, and the decidua, which is the portion of the uterus where implantation occurs. The flattened, disk-shaped layer of cells is the embryonic disk; it will develop into the body.

The Nurse Is Explaining the Process of Cell Division During