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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
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Author
HLW
ID
39086
Card Set
Musculoskeletal Derivatives
Description
Musculoskeletal
Updated
2010-10-02T16:39:19Z
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