Exam 44: Survey of Embryonic Development

The function of cleavage is to _________.

Name the blood vessel that carries oxygen- rich blood to the fetus.

The decidua basalis and decidua capsularis are portions of the uterine wall. Which is(are)involved in formation of the placenta?

The human blastocyst consists of two populations of cells with different functions. Select the correct match between population and its function.

This cord attaches the embryo to the placenta.

The placenta is formed by _________.

In what region of the uterus does implantation usually occur (as indicated by the position of the placenta)?

The three primary germ layers develop during this stage of human fetal development.

During the process of implantation, the inner cell mass (ICM)gives rise to three embryonic membranes. Which of the following is not one of these membranes?

Implantation of the blastocyst in the uterine wall is complete by day _________after ovulation.

This portion of the blastocyst forms the embryo proper.

All exchanges between mother and embryo occur_________ .

Once fertilization has occurred, the activities of development begin. The first such activity is_________ .

In the human, this germ cell layer gives rise to many of the organ systems, including the skeleton, skeletal muscles, walls of GI organs, urinary system, and circulatory system.

The trophoblast cells of the blastocyst form the_________ , which extends elaborate villi into the blood- filled sinusoids of the uterine wall.

In humans, the yolk sac_________ .

Fertilization_________ .

What organs appear very early in development?

This structure surrounds the early embryo and the fluid that fills it protects the embryo.

Chorionic villi look like_________ .