EVERYDAY SCIENCE

Detailed explanation-1: -germ layer, any of three primary cell layers, formed in the earliest stages of embryonic development, consisting of the endoderm (inner layer), the ectoderm (outer layer), and the mesoderm (middle layer).

Detailed explanation-2: -Three primary germ layers Gastrulation is a key phase in embryonic development when pluripotent stem cells differentiate into the three primordial germ layers: ectoderm, mesoderm and endoderm.

Detailed explanation-3: -In reptiles, avians, and mammals, which are triploblastic organisms, gastrulation derives a three tissue-layered organism composed of endoderm, mesoderm, and ectoderm; each germ layer corresponds to the development of specific primitive systems during organogenesis.

Detailed explanation-4: -Ectoderm-It is the outermost layer that forms nails, hair, etc. Endoderm-It is the innermost layer that forms the stomach, colon, urinary bladder, etc. Mesoderm-It is the middle layer between ectoderm and endoderm which forms bones, cartilage, etc.

Detailed explanation-5: -In all animals, except for organisms of the phylum Cnidaria, the endoderm and ectoderm interact to produce a third germ layer, called mesoderm.