Select the Choice That Correctly Associates the Organ with Its

Question

Select the choice that correctly associates the organ with its embryonic sources.
A)anterior pituitary gland-mesoderm and endoderm
B)thyroid gland-mesoderm and ectoderm
C)adrenal gland-ectoderm and mesoderm
D)skin-endoderm and mesoderm
E)brain-mesoderm and endoderm

Accepted Answer

The adrenal gland is derived from both the ectoderm and mesoderm, specifically the outer layer of the adrenal gland originates from the mesoderm while the inner layer or medulla is derived from the ectodermal tissue. The other choices are incorrect as the anterior pituitary gland is derived from the surface ectoderm, the thyroid gland is derived solely from the endoderm, the skin is derived from the ectoderm and the brain is derived solely from the ectoderm.