Developmental Anatomy Of The Musculoskeletal System

Question 1

Period of early development when the three germ layers are formed.

Answer 1

1st week - 3rd week

Question 2

External layer of mesoderm formed after the split of the lateral plate. It associates with the ectoderm and contributes to connective tissue of body wall and limbs.

Answer 2

Somatic mesoderm

Question 3

Inner layer of mesoderm

Answer 3

Splanchnic/ Visceral mesoderm

Question 4

The paraxial mesoderm leads to the formation of which body structures? (Skeletal structures)

Answer 4

1. Skull (somitomeres)
2. Torso (somites)

(Embryonic mesenchyme e.g.. fibroblast, chondroblast, osteoblast excluding the limbs, hence the name “paraxial”)

Question 5

Lateral plate mesoderm leads to the formation of which body structures: (skeletal structures)

Answer 5

1. Shoulder
2. Pelvic girdle
   (Limbs/ extremities)

Question 6

The neural crest forms the mesenchyme of:

Answer 6

1. Face

2. Skull