Anatomy Where the endoderm and ectoderm approach each other in the head & neck region during the 4th week A Pharyngeal Grooves B Pharyngeal pouch C Pharyngeal membrane D Pharyngeal arch 💡 Explanation Where the endoderm and ectoderm approach each other in the head & neck region during the 4th week ✓ Correct Answer: C. Pharyngeal membrane