Mesoderm derivatives


Mesoderm derivatives

  1. All muscles are derived from mesoderm except iris muscle(constrictor and dilator pupillae derived from neuroectoderm).
  2. Skeletal system-bone,tendon,aponeurosis
  3. Whole cardiovascular system(heart,vessels,lymphatics,blood cells)
  4. Renal system - Kidney,ureter,trigone of bladder,posterior wall urethra in female,posterior wall of prostatic urethra in male and intragladular portion of prostate(Nontrigone bladder,nonposterior wall parts of female urethra,non posterior wall of prostatic urethra and non gladular prostate are derived from endoderm)
  5. Reproductive system - Ovary,uterine tubes,uterus,upper part of vagina,testis,ductus deferens,epididymis,seminal vesicles.(penile urethra,distal 1/2 of labia minora,labia majora are derived from ectoderm)
  6. Dentine of teeth(enamel is ectodermal)
  7. Mesothelial lining of pleural,peritoneal,pericardial cavities
  8. Duamater and microglial cells(rest whole nervous system is ectodermal derived from meural crest and neural tube)
  9. Stroma of cornea,ciliary body,iris,sclera,vitreous.

Neural crest derivatives


Structures derived from neural crest :
  1. Piamater and arachnoid mater
  2. Glial cells
  3. Parasympathetic chain of GIT
  4. Adrenal medulla
  5. Odontoblast and dermis of face and neck
  6. Neurons of cranial nerves 5 to 10,sympathetic ganglia,sensory spinal nerve roots
  7. Chromaffin tissue,C-cells of thyroid gland,conotruncal septum oh heart
  8. Schwan cells
  9. Melanoblast
Mnemonic : PiaG please add odd and new 3 colours of sense to me