MCAT Question A Day - 1/25/14 - Answer!

Which of the following sets of structures derive from the same primary germ layer?

A. Bones, muscles, kidneys, and blood

B. Stomach, lungs, urinary bladder, and liver

C. Sweat glands, brain, lining of the mouth, and eyes

D. All of the above

The correct answer is (D). Choice (A) includes structures that all derive from mesoderm, choice (B) consists of endodermal organs, and choice (C) contains ectodermal structures.

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