Actually ur question is itself not correct so the 'WHY" part cannot be answered.
Epithelial tissue is a lining tissue which can be present in any organ.the mesoderm gives rise to organs like-muscles / bones / connective tissue / blood and lymph vessels / kidney / gonads and the cortex of suprarenal glands.
ectoderm-nervous system epidermis and so on and
endodermto GIT liver lungs pancreas and GIT
so for example if u consider the epithelial tissue of lungs----its derived from endodermas lung as a whole is derived from endoderm.
From inner to outer, the germ cell layers are the endoderm, mesoderm, and ectoderm. Each of the three layers develops into a different part of the embryo: the endoderm into the respiratory, auditory, and digestive system; the mesoderm into the skeleton and muscles; and the ectoderm into the skin, tooth enamel, and nervous system.
Three layers , ectoderm , mesoderm and endoderm .
endoderm, mesoderm, then ectoderm
ecko endo meso Means=Ectoderm, endoderm, mesoderm
Ectoderm, Mesoderm, Endoderm.
From inner to outer, the germ cell layers are the endoderm, mesoderm, and ectoderm. Each of the three layers develops into a different part of the embryo: the endoderm into the respiratory, auditory, and digestive system; the mesoderm into the skeleton and muscles; and the ectoderm into the skin, tooth enamel, and nervous system.
Germ layers give rise to all of animal's tissue and organs.
Phylum Platyhelminthes have three tissue layers: ectoderm, mesoderm, and endoderm.
Ectoderm, endoderm and mesoderm.
The mesoderm. It is the forerunner of muscles, most of the skeleton, the circulatory, reproductive and excretory systems, connective tissues and integument.
There are three layers: ectoderm, mesoderm, and endoderm.
Ectoderm, endoderm, and mesoderm can produce epithelial tissues
Three layers , ectoderm , mesoderm and endoderm .
There are three layers: ectoderm, mesoderm, and endoderm.
Yes, Endoderm, Mesoderm, and Ectoderm.
ectoderm
They have two layers the endoderm and ectoderm.