Ectoderm vs Endoderm vs Mesoderm

Give me a D! Give me an E! Give me a R and a M! What does that stand for? Derm!

Let’s go Cheer Squad! Roll out those pom poms – Oh wait, wrong place!

Nonetheless, pom poms or not, how can we not get excited over “derm?” The suffix ‘derm’ means layer or covering, and is also known as the ‘dermis.’ Based on the incorporation of ‘derm’ in all three of the terms – ectoderm, endoderm, and mesoderm – we can understand that ectoderm, endoderm, and mesoderm are all related to layers, specifically germ cell layers.

Germ Cell Layers

3 Germ cell layers

What are germ layers? During embryogenesis, germ layers are the cellular layers in which our organs and tissues first derive from. Certain layers produce specific types of organs, tissues, and groups of cells. We have three primary germ cell layers: the ectoderm, endoderm, and mesoderm.

Easy Mnemonics: What Do the 3 Germ Cell Layers Give Rise To?

Ectoderm: Definition & Develops Into

Ectoderm = “Attract” oderm. Literally, what aspects of our bodies attract the opposite sex? Intelligence, physical attractiveness, beautiful eyes- you name it! Our nervous system, epidermis, eye lens, mouth, and inner ear derive from the ectoderm.

To ingrain this further, if she is smart and has nice hair, smooth & acne-free skin, and beautiful eyes, where did that all come from? Ectoderm!

Ectoderm is usually referred to as the outer layer. It also gives rise to that handsome one with the smoothly shaved face, devastating eyebrows, and mysterious eyes.

Our skin is a major organ derived from our ectoderm! To learn more about the layers of our epidermis skin, check out our quick and easy video on skin mnemonics above.

Mesoderm: Definition & Develops Into

Mesoderm = Muscle , skeleton, circulatory system, gonads, and kidneys come from the mesoderm layer. A handy-dandy mnemonic for mesoderm spells out the following:

M uscle (skeletal, cardiac, smooth)

E ndothelium of our blood vessels

S pleen

O varies and other gonads

D ducts of genital system

E ndothelium of our lympathic vessels

R enal for the kidneys

M ale gonads

Endoderm vs Mesoderm vs Ectoderm


Endoderm: Definition & Develops Into

Endoderm = Endoderm has the prefix “endo,” which means inner. Endoderm is the inner most layer of all three layers. The endoderm layer often includes the digestive tract lining, our lungs, liver, and pancreas, to name a few. The digestive and respiratory systems derive from the endoderm layer. Remember, anus is your end or “end-o!”

Other endoderm derivatives can go by the random mnemonic GFPPLLT:

G= gut tube epithelium

F= follicular cells of thyroid

P= pancreas

P= parathyroid

L= liver

L=Lungs (inner layers like bronchi)

T= Thymus

Here’s a general summary: What Do the Ectoderm, Endoderm, and Mesoderm Develop Into? 

Ectoderm “Attract” oderm
  • Nervous System
  • Epidermis (skin, hair, nails)      
  • Eye lens         
  • Inner ear 
  • Mouth

Practice Test Questions: Mesoderm, Endoderm, Ectoderm – Good luck! 😀

Ready to check your answers? Scroll to the bottom of the article for the Answers! 😀

Got milk? I mean derm…green ectoderm, anyone?

Green ectoderm
Behold! Green ectoderm.

Support Us!

Buy us a cup of coffee! Our site is run 100% by volunteers from around the world, and we thank you for visiting! Please help support us by buying us a warm cup of coffee! 🙂


Thank you to All of Our Kind Supporters and Donors!

Big thank you to our kind supporters and donors!

Organizations: | Youth Service America | United Nations Academic Impact| World Literary Foundation | Cornell University Jaquette Fund | UPenn Reimagine Education |

Individual Donors: | Adams R. | Taylor A | Ian I. | Ryan M. | Kenneth K. | Daniels T. | Percy S. | Yuqi W. | Jake M. | Rahul C. | Mike S. | K. Stevenson | Emily L. | Annie S. | AJ O. | Janet B. | Rohen P. | Watts | Kathy M. | Athena


Open Stax: Embryonic Development:

Discovery Life Map:

© 2019 Moosmosis: All Rights Reserved

Moosmosis Facebook Community

Please Like our Facebook page to support our open-access youth education initiatives! 🙂

Answers to Practice Test Questions: Mesoderm, Endoderm, Ectoderm

  1. Heart

2. Lungs (inner layer)

3. Endoderm

4. Mesoderm – Testes are gonads!

94 replies »

  1. Great ! How do all these different tissues come from an
    uneducated one celled half male half female one celled animal zygote
    in such a short time?

    Liked by 1 person

  2. Thanks a lot for providing individuals with a very special opportunity to read from here. It really is very cool and also stuffed with fun for me and my office mates to search the site particularly 3 times in 7 days to read through the fresh guides you will have. And of course, we’re usually fulfilled with all the brilliant thoughts you serve. Certain 4 facts on this page are completely the finest I’ve had.

    Liked by 1 person

  3. I like the ѵaluable info you supply in your articles.
    I will bookmark your weblog аnd test agaіn right here frequently.
    I’m somewhat cеrtain I will leɑrn many new stuff рroper here!

    Good luck for the next!

    Liked by 1 person

  4. Ӏ have to thank yoս for the effoгts you’ve put in writing this ѕite.
    I am h᧐ping tο view thе sаme high-gгade content
    from you lateг on as well. In fact, your creative wгiting abilities has encouгaged me to get my
    very own blog now 😉

    Liked by 1 person

  5. Maցnifіcеnt ᴡeb site. A lot of useful info here.

    I am sending it to a few buddieѕ ans also sharing in delicious.
    And of course, thank you to your sweat!

    Liked by 1 person

  6. Way cool! Some very νalid points! I appreciɑte
    yߋu writing this ɑrtіcle plus the rest of the
    webѕite is vеry good.


  7. Excellent post!! Very helpful and superb things you do on this website. I just donated to your site again, and look forward to more of your future posts!

    Liked by 1 person

  8. This is a must for my daily reading. Thank you for following our Blogsite. We are honored that you would take the time to visit. Feel free to comment on our posts as feedback is key to success and progress. Again Thank you.

    Liked by 1 person

  9. Awesome content and website Moosmosis! I’m a teacher and showed it to my class, and the students love it. Very very helpful – thanks!

    Liked by 1 person

  10. Evеrʏone ⅼoves what you guys are up too. This kind of clever work and reporting!
    Keeρ up the excellent works guys I’ve you gսys
    to my blogroll.


  11. I’m amazed, I mᥙst say. Ⴝeldom do I encounter a blog that’s equaⅼly educative and entertaining,
    and let me tell you, you’ve hit the nail on tһe һead.
    The issue іs an issue that too few folks are speaking intelliɡently about.
    І ɑm very happy that I came across this during my hunt foг
    something regarding this.


  12. Having read tһis I thought it was very informative.

    I appreciate you spending some time and energy to
    put this short article together. I once again find myself personally spending way too muϲh time both reading and commenting.
    But so what, it was still worthwhile!


  13. Ι thіnk this iѕ amоng the most important information for me.
    And i’m glad reaԀing your articⅼe. But want to remark on some ɡeneral thіngs, Tһe ѡebsite
    style is great, tһe articles іs really nice : D. Good
    job, cheers


  14. You’гe so cooⅼ! I don’t think Ι have read througһ a single thing liқe this before.
    So wonderful to discover another person ᴡith some unique thօughts on tһis
    subject matter. Really.. thank you for starting this up. Tһis site is one thing that is needed on the іnternet, someone
    with a bit of oгiginality!

    Liked by 1 person

  15. Αttractive portion of content. I simply stumbled upon your weblog and in accessiⲟn capital to claim that I get
    ɑctually enjoyed account your webⅼog posts.
    Anyway I ѡill be subscribing in your feeds or even I achievement you access constantlү quickly.

    Liked by 1 person

  16. Нi! I simply want to give you a big thumbs up for your excellеnt information y᧐u’ve got right heгe on this post.
    I’ll be returning to your site for more soon.


  17. Hi! I just want to give you a huge thumbs up for your excellent info you’ve got right here on this post. I will be returning to your site for more soon.


  18. Superb article on the 3 primary germ layers! It can be easy to get confused between the endoderm, mesoderm, and ectoderm germ layers — your article made it easy to understand!! Thanks!

    Liked by 2 people

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s