What layer originates the parenchyma of the tonsils and thymus?
Ectoderm? Mesoderm? or Endoderm??
The lymph and lymph vessels?
What layer forms the epithelium of the tympanic cavity, antrum and auditory tube?
What layer is the origin of the mammary glands?
yep: skin, nerves, brain and boobs
What TWO layers form the adrenals?
medulla is ecto
cortex is meso
What layer originates the ovaries, testes and genital ducts?
What layer forms the thyroid and parathyroid?
What TWO layers become the pituitary?
What layer forms connective tissue and serous membranes?
What layer forms the LIVER and pancreas?
What layer forms the spleen, blood and blood vessels?
plus neural crest cells for the SA and AV nodes, bundle of his, purkinje fibers etc.
The epithelium of the bladder, most of the urethra?
Get the pattern?
Grouping now to see if there is a pattern I can grasp:
CNS, PNS, retina of eye, sensory epithelia of ear, nose
posterior pituitary and adrenal medulla
all of the above are neuro
epidermis and appendages including the breasts
bone & bone marrow, blood & lymph (vessels and cells), spleen
muscle (incl heart and smooth muscle of GI), serous membranes
kidneys, adrenal cortex
ovaries, testes, genital ducts
gastric and respiratory epithelium (lungs!)
parenchyma of tonsils, thymus
glandular cells of thyroid, parathyroid, liver, pancreas
epithelial lining of bladder, most of urethra
epithelial lining of tympanic cavity, tympanic antrum, auditory tube