ER

Question 1

1st aortic arch derivatives

Answer 1

Part of maxillary artery which is a branch of the ECA
“1st arch is MAXimal”
INVOLUTES!

Question 2

2nd aortic arch derivatives

Answer 2

Stapedial artery and hyoid artery
“Second = Stapedial”
INVOLUTES!

Question 3

3rd aortic arch derivatives

Answer 3

Common Carotid artery and proximal part of internal Carotid artery
“C is the 3rd letter of the alphabet”

Question 4

4th aortic arch derivatives

Answer 4

Left: aortic arch
Right: proximal part of right subclavian artery

Question 5

6th aortic arch derivatives

Answer 5

Proximal part of pulmonary arteries and on left ductus arteriosus
“6th arch is pulmonary and pulmonary-to-stystemic shunt: ductus arteriosus”
DISTAL RIGHT INVOLUTES

Question 6

MF Homologs: genital tubercle

Answer 6

M: glans penis, corpus cavernosum and spongiosum
F: glans clittoris, vestibular bulbs

Question 7

MF Homologs: urogenital sinus

Answer 7

M: bulbourethral glands of cowper, prostate
F: greater vestibular glands of bartholin, urethral and paraurethral glands

Question 8

MF Homologs: urogenital folds

Answer 8

M: ventral shaft of penis
F: labia minora

Question 9

MF Homologs: labioscrotal swelling

Answer 9

M: scrotum
F: labia majora

Question 10

Male homolog of female theca interna cells?

Answer 10

Leydig cells

Question 11

What do theca interna cells do?

Answer 11

Have receptors for LH, secrete androstenedione which is a precursor for estrogen

Question 12

What do granulosa cells do?

Answer 12

Have receptors for FSH, secrete aromatase which converts androstenedione to estrogen