From which of the following germ layers does the circulatory system arise?

From which of the following germinal layers does the retina of the eye originate?

A new born is assesed to have congenital nerve conduction defects. From which germ layer would this problem originate?

A newly born child is having difficulty breathing and digesting food. A close medical examination has revealed an improperly formed inner lining to the digestive and respiratory systems. Which of the following is the most likely cause of the medical problem?

Which of the following structures does not arise from the endoderm?

Which of the following is NOT a major germ layer formed during gastrulation?

Which of the following structures does not arise from the mesoderm?

The mesoderm germ layer eventually gives rise to the formation of the __________.

The kidneys arise from which of the three embryonic germ layers?

Which embryonic structure is a precursor to the spinal cord?