Development of the Vertebrae (Musculoskeletal Development) Flashcards
Splitting of the Sclerotome
Neurons from (1)____ extend to innervate the nearby myotomes and dermatomes; must be able to penetrate the surrounding sclerotome
the neural tube
Splitting of the Sclerotome
Neurons from the neural tube extend to innervate the nearby ____ and ____; must be able to penetrate the surrounding sclerotome
myotomes and dermatomes
Splitting of the Sclerotome
Neurons from the neural tube extend to innervate the nearby myotomes and dermatomes; must be able to penetrate the surrounding____
sclerotome
Splitting of the Sclerotome
Neurons from the neural tube extend to innervate the nearby myotomes and dermatomes; must be able to penetrate the surrounding sclerotome
→ Sclerotomes obligingly split into half as ____ develop within them, allowing the nerves to pass
von’s Ebner fissures
Splitting of the Sclerotome
Sclerotome remnants fuse with their neighbors before becoming vertebrae
→ vertebrae come from portions of____
two neighboring scleromtomes
Splitting of the Sclerotome
____ fuse with their neighbors before becoming vertebrae
→ vertebrae come from portions of two neighboring scleromtomes
Sclerotome remnants
Splitting of the Sclerotome
Nucleus pulposus is the only (1)____
→ annulus fibrosus develops from (2)____
- mature remnant of the notochord
- the sclerotome mesenchyme
Splitting of the Sclerotome
- ____ is the only mature remnant of the notochord
- develops from the sclerotome mesenchyme
- Nucleus pulposus
- annulus fibrosus
Ossification of the Vertebrae
Sclerotome mesenchyme forms models of the eventual vertebrae; must be replaced by something stronger to support the body
→ _____ form within mesenchyme and replace it with cartilage starting in the 6th week
Chondrification centers
Ossification of the Vertebrae
Sclerotome mesenchyme forms models of the eventual vertebrae; must be replaced by something stronger to support the body
→ Chondrification centers form within mesenchyme and replace it with ____ starting in the ___
- cartilage
- 6th week
Ossification of the Vertebrae
7th week: (1)____ is replaced by bone
→ primary ossification centers form in (2)____ and -___
- Cartilage model
- vertebral body and pedicles
Splitting of the Sclerotome
Bone gradually replaces cartilage except in synovial joints
→ not complete until after adolescence when _____ in transverse processes, spinous processes, and annular epiphyses fuse to the rest of the bony vertebra
secondary centers of ossification
Splitting of the Sclerotome
Bone gradually replaces cartilage except in synovial joints
→ not complete until after adolescence when secondary centers of ossification in ____ (3) fuse to the rest of the bony vertebra
transverse processes, spinous processes, and annular epiphyses
Splitting of the Sclerotome
Bone gradually replaces cartilage except in synovial joints
→ not complete until after adolescence when secondary centers of ossification in transverse processes, spinous processes, and annular epiphyses fuse to the rest of____
the bony vertebra
Ossification of the Vertebrae
____is final region to ossify
Spinous process
Ossification of the Vertebrae
Transition from mesenchyme to cartilage and bone is ____
endochondral ossification
Development of the Ribs and Sternum
____ extending from the vertebrae elongate in the thoracic region, create ribs
Costal processes
Development of the Ribs and Sternum
Costal processes extending from the vertebrae elongate in the thoracic region, create ____
ribs
Development of the Ribs and Sternum
Costal processes extending from the vertebrae elongate in the thoracic region, create ribs
→ ____ creates anterior body wall, tips of the ribs fuse with mesenchyme which forms the body sternum
Lateral plate mesoderm
Splitting of the Sclerotome
→ Identify
Identify
Primary ossification centers
Ossification of the Vertebrae
→ Identify
Ossification of the Vertebrae
→ identify
Ossification of the Vertebrae
→ identify
