Formation of Tongue - Week 4

Question 1

Where do the four lingual swellings appear during the 4th week?

Answer 1

ventral, inside surface of mandibular process of branchial arch I, II, III (front wall of pharynx). During the 4th week the 4 lingual swellings merge to become a tongue.

Question 2

What are the names of the 4 lingual swellings?

Answer 2

Tuberculum Impar
2 Lateral Lingual Swellings
Copula

Question 3

What do the tuberculum impar and 2 lingual swellings become?

Answer 3

Anterior 2/3 of tongue

Copula becomes posterior 1/3 of tongue