General Anatomy & Embryology · NEET PG Preparation Anatomy
During the third week of human embryonic development, gastrulation occurs, establishing the three primary germ layers. Which of the following structu…
Practice question from General Anatomy & Embryology (NEET PG Preparation Anatomy), with the correct answer and a step-by-step solution.
easy · MCQ · Q-DCB21F
During the third week of human embryonic development, gastrulation occurs, establishing the three primary germ layers. Which of the following structures is derived exclusively from the embryonic endoderm?
- A.Spleen
- B.Adrenal cortex
- C.Epithelial lining of the urinary bladderCorrect answer
- D.Dura mater
Solution
The epithelial lining of the urinary bladder and urethra is derived from the urogenital sinus, which originates from the endoderm (specifically, the hindgut derivative). The spleen is mesodermal, the adrenal cortex is mesodermal, and the dura mater is largely paraxial mesoderm and neural crest.
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