Development of the vertebral column, Ribs, and Sternum

Question 1

What is the primary skeletal progenito tissue?

Answer 1

mesenchyme

Question 2

paraxial mesoderm forms:

somatic mesoderm forms:

Answer 2

paraxial mesoderm: vertebral colum and ribs

somatic mesoderm: sternum and limb skeleton

Question 3

the vertebrae are derived from scleratome cells

Question 4

scleratome tissue organizes into _____ and _______ subdivisions and does ________ to form vertebrae

Answer 4

sclerome tissue organizes into cranial and caudal subdivisions and does resegmentation to form vertebrae

Question 5

what are the subdomains of scleratome tissue?

central

ventral

dorsal

lateral

somitocoel cells

syndetome

meningotome

Answer 5

• central- pedicle, proximal rib
• ventral- vertebral body, IV disc
• dorsal- dorsal part of neural arch, spine
• lateral- distal rib
• somitocoel cells- vertebral joints, IV disc, proximal
• syndetome- tendons
• meningotome- meneges

Question 6

cells from the cranial (anterior) half of the scleratome contribute to:

Answer 6

cells from the cranial (anterior) half of the scleratome contribute to:vertebral body, small parts of neural arch and distal rib (in thoracic region)

Question 7

cells from the caudal (posterio) half of the scleratome contribute to

Answer 7

vertebral body, transverse process, most of neural arch and proximal part and main part of distal rib (in thoracic region)

Question 8

cells at the intersegmental boundry and somatocoel cells form ____-

Answer 8

the intervertebral disc

Question 9

regionalization of forming vertebrae is associated with _______

it extends ____ and becomes a ___________ in the thoracic region