Development of the Musculoskeletal system Flashcards
When does the development of the musculoskeletal system begin
4th week
how long does the development of the musculoskeletal system last
through fetal period and even after birth
What does skeletal tissue arise from
mesenchyme (regions differ)
Arises from mesenchyme derived from the scolerotom portion or mesodermal somites
axial skeleton
Arise from mesenchyme derived from the lateral plate mesoderm
appendicular skeleton
pectoral girdle, pelvic girdle and limbs
appendicular skeleton
the axial skeleton is what in origin
segmented
The bones or the face and some of the bones covering the brain arise from
Neural crest cells
Other Cranial bones arise from
Mesoderm
Vertebral column, ribs and neurocranium mesenchyme arise form
paraxial mesoderm
pectoral girdle, pelvic girdle, limbs and sternum mesenchyme is developed from
lateral plate mesoderm
Viserocranium and hyoid mesenchyme is developed form
Neural crest cells
The roof and the base of the skull are developed from
paraxial mesoderm
Calvaria
Skull cap
Where are neural crest cells derived form
ectodermal origin
Anterolateral facial bones
Viserocranium
Bones encasing the brain
Nuerocranium
Nuerocranium is formed from what types of ossification
Membranous and cartilaginous
Neurocranium that is formed by cartilaginous ossification
base of the skull
Neurocranium that is formed by membranous ossification
Calvaria
Lesser wing of the sphenoid, petrous potion of the temporal bone, portions of the ethmoid and occipital bones
base fo the skull
membranous flexible joints of the skull in infants
sutures
enlarged membranous space where more than 2 bones meet
fontanelles
Area where the 2 parietal bones and frontal bones meet
anterior fontanelle
Spinal nerves in the cervical region (does/ does not) match the number of vertebrae
Does not
Spinal nerves in the thoracic region (does/ does not) match the number of vertebrae
Does
Spinal nerves in the lumbar region (does/ does not) match the number of vertebrae
Does
Spinal nerves in the sacral region (does/ does not) match the number of vertebrae
Does
when the cells in the sclerotome split, the cells in the line of division coalesce
Annulus fibrosus
The Annulus fibrosus enclosed the notochord
nucleus pulposus
What happens the the notochord everywhere that it is not found in the Annulus fibrosus
degenerates
Grows out lateral extensions of the costal processes developing from the thoracic vertebrae
Ribs
lateral extensions of the costal processes developing from the thoracic vertebrae to form the ribs
Wrap anteriorly
development of the ribs is dependent on the development of the
vertebrae
What type of joints form where costal process meets the vertebrae
synovial
Mesenchyme in what region forms the ribs
costal
Induced to form by the ribs at the ventral midline
sternum
What type of tissue forms the sternum
Lateral plate SOMATIC mesoderm
Develops as 2 bars that with fuse cranial to caudal
Sternum
Part of the axial skeleton that is not formed from paraxial mesoderm
Sternum
Fusing of the sternal bars for the
cartilaginous model
Mesenchyme of the appendicular skeleton forms from the
lateral plate SOMATIC mesoderm