Aortic Arch Derivatives

Question 1

1st aortic arch

Answer 1

MAXillary artery (1st is max)

Question 2

2nd aortic arch

Answer 2

Stapedial artery and hyoid artery (Second = Stapedial)

Question 3

3rd aortic arch

Answer 3

Common Carotid + internal Carotid (C is the 3rd letter of alphabet)

Question 4

4th aortic arch

Answer 4

aortic arch and R subclav (4th arch = systemic to 4 limbs)

Question 5

5th aortic arch

Answer 5

nothing

Question 6

6th aortic arch

Answer 6

pulmonary arteries + ductus arteriosus (connects ao to pulm artery)

Question 7

Genital tubercle

Answer 7

Males: glans penis, corpus cavernosum and spongiosum
Female: glans clitoris, vestibular bulbs

Question 8

Urogenital sinus

Answer 8

Male: prostate, bulbourethral glands (of Cowper)

Female: Greater vestibular glands (Bartholin) and Urethral/paraurethral glands (Skene)

Question 9

Urogenital folds

Answer 9

Male: ventral shaft of penis (penile urethra -> hypospadias (assoc with inguinal hernia and cryptorchidism))

Female: labia minora

Question 10

Labioscrotal swelling

Answer 10

Male: scrotum
Female: labia majora