Gynaecology & Obstetrics Which of the following is true about the endometrium A Spiral arteries extend directly from radial arteries. B Basal artery comes directly from arcuate artery. C Spiral arteries extend directly from arcuate artery. D Spiral arteries and radial arteries are in functionalis layer of endometrium. 💡 Explanation Which of the following is true about the endometrium ✓ Correct Answer: A. Spiral arteries extend directly from radial arteries.