How to remember germ tissue layers?

Started by ej37
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ej37

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I keep seeing germ tissue questions popping up on practice questions. I can't seem to keep straight what systems arise from what germ layers... how do you guys remember what comes from ectoderm, mesoderm, endoderm?
 
  • Ectoderm ---> Integument (everything you can see), lens of the eye and nervous system;
  • Endoderm---> lining of digestive and respiratory tracts, parts of liver, pancreas, thyroid and bladder;
  • Mesoderm---> circulatory system, excretory system, muslces, connective tissue, organs.
Make a list a keep reviewing it.
 
This is definitely more broad and not 100%, but helped me out a lot in Vert Morph:

Ecto = outside, what you can see
Meso = middle layers
Endo = inner, the gut tube
 
I had this comparative anatomy book that has like the embryo development and like all the germ layers color coded... You might want to have something like that.. sometimes a picture is worth a thousands words and helps out recall a lot.
 
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Ectoderm- just think Ecto for Exterior... skin and stuff

Mesoderm- in the middle- linings and really any place that something you inhale or swallow end up- GI tract, lungs, bladder etc.

Endoderm- all the other stuff in there- for histology class the big thing was connective tissues- remember bone is connective tissue too!
 
Ectoderm- "attract o derm" - what attracts a mate? Eye lens, the skin, exterior traits
Mesoderm- "muscle" - muscle, circulatory & urinary systems (heart/bladder are muscles)
Endoderm - "endernal organs" - including lining of internal organs/tracts, etc

Mnemonics Courtesy of Kaplan
 
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This is waht I'm using to remember, anyone wanna try and pick it apart? (not a mnemonic but it will reduce the amount of work you have to do)

ecto - 'ecto' means outside so anything on the outside, plus the central nervous system (brain + spinal cord)

meso - Musculoskeletal system (including the tissue that connects), vascular system (including teh heart and the spleen because that's all red blood cells 😛), urogenital system (so that would mean kidneys/bladder and the reproductive organs), notochord

endo - everything else


c'mon that's only four things to memorize for meso i'd asy that's pretty good