ectoderm-skin.mucous membrane of lips.cheeks.gums.part of floor of mouth.part of the palate.nasal cavities.paranasal sinuses.lower part of anal canal.terminal part of male urethra.outer surface of labia minora and whole labia majora.ant.epithelium of cornea.epithelium of conjunctiva,ciliary body and iris.outer layer of tympanic membrane,epithelial lining of membrenous labirinth.glands.hair,nails.enamel of teeth.lens of eyes.musculature of iris.nervous system.pia-arachnoid.branchial cartilage mesoderm-all connective tissues.dentine of teeth.all muscles except musculature of iris.hearts.all blood vessels.lymphatics.blood cells.kideny.ureter.post. wall of part of female urethra.post. wall of upper half of prostratic male urethra.inner glandular zone of prostate.overy.uterus.uterine tubes.upper part of vagina.testes.epididymis.ductus deferens.seminal vesicles.ejeculatory ducts.lining mesothelium of pleural,pericardial and peritonial cavities and of tunica vaginalis,bursae and joints.substance of cornea,sclera,choroid,ciliary body and iris.durameter,microlgia.
2006-06-11 02:37:00
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answer #1
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answered by buddy 1
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ECTODERM
What forms from it (general)?
Nervous system
Outer part of integument
[edit]
What forms from it (vertebrates)?
In vertebrates, the ectoderm has three parts: external ectoderm, the neural crest, and neural tube.
External Ectoderm
skin (along with glands, hair, nails)
epithelium of the mouth and nasal cavity
lens and cornea of the eye
Neural Crest
melanocytes
peripheral nervous system
facial cartilage
dentin (in teeth)
Neural Tube
brain (rhombencephalon, mesencephalon and prosencephalon)
spinal cord and motor neurons
retina
posterior pituitary
MESODERM
Derivatives
[edit]
General
Note: Not all triploblasts produce all of the items listed.
bones
most of the circulatory system, including the heart and major blood vessels
connective tissues of the gut and integuments
gastrointestinal tract
mesenchyme
mesothelium
muscles
peritoneum (lining of the coelom)
reproductive system
urinary system, including the kidneys
2006-06-11 01:59:24
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answer #2
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answered by ♥Ani♥ 4
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