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Kaplan Qbank USMLE



Author8 Posts
  #1

What does the mesoderm form,ok muscle and ??

  #2

there are a million things

bones except skull and facial
connective tissue
macrophages
RBCS
spleen
substantia propria of cornea
inner epithelium of cornea
testes
kidney
extraocular muscle
sclera and choriod
endothelium lining the blood vessels
Dermis

There are more i'm sure, but this is what I can remember offhand, someone else can fill in the rest of the gaps

  #3

Dermis are you sure ?

  #4

Wow !

  #5

So there is alot to do

  #6

adrenal cortex heart ovaries


  #7

mesoderm can be divided into the following:
1-axial mesoderm:which will give prechordal plate and notochord which in turn will help in STIMULATING the neurolation and will give to some parts of occipital bone+the remenets will of notochord will give rise to the intervertebral disks.
2-para-axial mesoderm:which will give rise to somites that will give Sclerotomes(vertebrae) + Myotomes will give rise to muscles support the skeleton +Dermatotomes will dive also dermis of each level of the vertebrae.(while epidermis is derived from outer ectoderm)
3-intermediate mesoderm:which will develop into urogenital system(including kidneys ofcourse).
4-lateral mesoderm:which is divided into somatopleuric and splanchnopleuric layers:
Spaces within the lateral plate(between the two layers) are enclosed and forms the intraembryonic coelom.

now.the splanchnopleuric will give rise to the viscer(spleen,pancreas....)+heart
the somatopleuric will give the dermis that enclose the abdominal cavity


  #8

great explns,thanks.

Dermis are you sure ?=yes,it is derivred from both somatic mesoderm which is located just beneath the ectoderm and mesoderm of the dermatomes of the body.And in the head and neck region it is derived from neural crest cells.







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