What are germ layers ( Ectoderm , Endoderm and Mesoderm ).with very simple and easy way.new 2025

Hello friends
In this video I have explained you all the germ layers that is ecto derm endoderm and mesoderm . hope you would understood it well . if you have any doubt ask me in comment or suggest me on other topic to upload video .
THESE LAYERS HELPS IN THE DEVELOPMENT OF EMBRYO . MEANS WE ARE MADE OF THESE WHEN WE WERE EMBRYO
Germ layers consists of three layers
1. Ectoderm - this layer makes the outermost layer forming the skin .
2. Endoderm - this layer lines the gut ( alimentary canal ) wall . this is the innermost layer
Alimentary canal -- It is the narrow tube joining the mouth to anus . it is also known as gut
3. Mesoderm - it is the layer lying between the ectoderm and endoderm . this layer develops the cavity for the organs to get accommodated.
Coelome -- it is the cavity between the gut wall lined by ectoderm and the endoderm . it is also known as coelomic cavity
Diploblastic Organisms -- I these organisms only two germ layers that is the ectoderm and the endoderm is present . Mesoderm is absent . Mesoglea is present
Eg. -- Porifera ( Sponges ) , Colenterata ( Cnidaria ) , Platyhelminthes ( Flatworms )
Mesoglea -- It is a jelly like fluid matrix found in diploblastic organsims and pseudocoelomatic organisms
Triploblastic organisms -- in these organsims all the three germ layers are present
Eg. Arthropoda ( Largest phylum of animal kingdom ) , Annelida , Mollusca , Echinodermata and Chordata
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