Skeletal System

Question 0

What is sclerotome? what does it form?

Answer 0

• ventromedial portion of somite

- forms vertebrae and ribs

Question 1

What are somites?

Answer 1

paired blocks of paraxial mesoderm on either side of notochord and neural tube

Question 2

What are dermomyotome? what do the cells form?

Answer 2

• dorsolateral portion of somite
• dermatome cells => fibroblasts => dermis
• myotome cells => myoblasts => mm.

Question 3

Mesenchyme cells migrate in what 3 directions?

Answer 3

• dorsally around neural tube
• ventrolaterally into the body wall
• ventromedially to surround the notochord

Question 4

What do the mesenchyme cells that migrate in 3 directions form?

Answer 4

dorsally = vert arch
ventrolaterally = costal process
ventromedially = centrum & intervert disc