Exam 3: The Tissue Level of Organization

The ectoderm develops into the epithelium of the skin, whereas this layer gives rise to the epithelial lining of the gut tube.

The neural tube develops from this layer.

Explain how conjoined twins may occur.

The ribs and vertebrae form from this primary germ layer.

Briefly describe the two cellular layers that comprise the bilaminar embryonic disc and explain their importance in embryonic development.

Splanchnic mesoderm gives rise to components of the cardiovascular system, including .

Limbs are complete.

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

The fetal period is the longer and later of the prenatal growth periods.

The hand develops with between the fingers.