Exam 3: The Tissue Level of Organization

Mesenchyme would refer to but not .

Splanchnic mesoderm forms the

This develops into the lining of the gastrointestinal tract.

Based on the proportions of the adult body, the 3-month fetus still shows disproportionately large

Division of cells in a zygote is called

By the end of week 3, the mesoderm has divided into the somites, intermediate mesoderm, and .

The urinary bladder is derived from which embryonic layer?

The outer membrane of the amniotic sac is called the amnion.

The sex of the fetus can be determined externally by approximately month .

is a clinical procedure that provides a genetic profile for a fetus.

Figure 3.1 Use the diagram above to answer the following questions. -Which letter indicates the morula?

Blood vessels and the heart arise from this primary germ layer.

Which of the following appears latest in human development?

A teratogen is

Conception occurs in the

The inner cell mass will form the embryo, and the trophoblast will form the placenta.

The neural tube of the embryo develops into the

This layer will give rise to the bones, ligaments and joints of the embryonic limbs.

Define the term teratogen, and explain why exposure to teratogens during the first 8 weeks of pregnancy is particularly dangerous.

Figure 3.1 Use the diagram above to answer the following questions. -Which letter indicates the zygote?