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Musculoskeletal Derivatives
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___-> ___-> ___-> Scleretomes + Myotomes + Dermatomes
Mesoderm ->
Paraxial Mesoderm ->
Somites
Scleretomes -> (2)
Vetebrae
Ribs
Myotomes ->
Muscle
Dermatomes -> (2)
Corium
Subcutis of skin
-> Appendicular Skeleton
Somatic Mesoderm
What contributes to facial bones
Pharyngeal Arch Mesoderm
Neural Crest Cells
General Steps of Intramembranous Ossification (3)
Mesenchymal cells
Osteoblasts + Matrix
Mineralization
General Steps of Endochondral Ossification (6)
Mesenchymal ->
Chrondroblasts + matrix ->
Hyaline Cartilage ->
Calcifiction->
BVs ->
Osteoblasts
Sites from which bone develops (4):
Scleretome
Somatic Mesoderm
Pharyngeal Arch Mesoderm
Neural Crest Cells
Bone Development Abnormality:
Chondrodystrophy
Chondrodystrophy-
Premature cassation of bone growth due to abnormal interstitial growth of cartilage
Medial part of Somites ->
Scleretomes
General Process of Vertebrae Formation
Scleretome cells surround neural tube and notochord
Scleretomes split and reunite
-> Ribs
Segemental Sclerotome
-> Sternum
Somatic Mesoderm
Ossificated occurs at day:
Rads Performed at day:
ossificaton
: 28
Rads
: 46
-> Anulus Fibrosus
Mesenchyme of Sclerotome
-> Nucleus Propulsus
Notochord
Inner & Outter parts of Intervertebral disk
Inner
: Nucleus Pulpoes (jelly)
Outter
: Annulus Fibrosus (fibrous)
-> Skeletal Mesoderm
Paraxial Mesoderm
-> Cardiac and Smooth Muscle
Splanchnic Mesoderm
Somites -> skeletal muscle located within (3):
Axial skeleton
Body wall
Limbs
Somitomeres -> Muscles located within:
head
Epimeres are innervated by:
Dorsal Rami of Sinal Nerves
Epimere ->
Epaxial Muscles
Hypomeres are innervated by:
Ventral Rami of Spinal Nerves
Hypomeres ->
Lateral and Ventral FLEXORS of thoracic and abdominal musculature
(Hypaxial mm)
Limb Field-
Area of somatopleure committed to forming a limb
Limb Bud-
Localized Proliferation of mesoderm, covered by mesoderm
Limbs grow from...
outside body wall somatopleure
-> Bone, Cart and CT of the limbs
Somatic Mesoderm
How does the Dermis and Skeletal Muscle of Limbs form?
Dermatome and Scleretome migrations into the limb
Limbs develops in a ___ to ___ order
Proximo-distal
(1)-> AER -> (3)
Ectoderm
Epidermis
Nails
Hair
Meromelia-
absence of 1+ limb parts
Micromelia
reduced size
Bimelia
plartial/complete duplication
Bones that form the base of the skull
Chondrocranium
Bones that form the vault of the skull
Desmocranium
Bones that form the face
Vicerocranium
->chondrocranium
occipital somites
chondrocranium -> (3)
Sphenoid
Ethmoid
Temporal
(petrous part)
-> Desmocranium
Neural Crest Cells
Desmocranium (4)->
Parietal
Frontal
Interparietal
Temporal
-> Viscerocranium
Mesenchyme of pharyngeal Arches
Viscerocranium (10)->
Lacrimal
Nasal
Incisive
Maxilla
Vomer
Palatine
Pterygoid
Zygomatic
Mandible
Temporal
Whic part of the skull develops from endochondral ossification?
Chondrocranial
Author
HLW
ID
39086
Card Set
Musculoskeletal Derivatives
Description
Musculoskeletal
Updated
2010-10-02T16:39:19Z
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