triploblastic cell system
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A triploblastic cell system refers to an embryo that has developed three primary germ layers: the ectoderm, mesoderm, and endoderm. These layers form during a process called gastrulation, which transforms a hollow ball of cells (blastula) into a more complex structure.123
The ectoderm is the outermost layer and gives rise to the nervous system, skin, and sense organs. The mesoderm, the middle layer, develops into muscles, connective tissues, bone, and the circulatory system. The endoderm, the innermost layer, forms the lining of the digestive tract, lungs, and various glands. These three germ layers are the foundation from which all the organs and tissues of an animal's body develop.24536
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