What do u know by Triploblastic please answer mark it Brainlest
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Answer:
having body tissues derived from three germ layer the endoberm, ectoderm and mesoderm.
Answer:
In animals the early embryo acquires fundamental cell layers through the process of gastrulation. These cell layers are called germ layers. In Trophoblastic animals, there are three types of germ layers viz, endoderm, mesoderm and ectoderm. These layers give rise to different organs of body during organogenesis.
All animals except porifera, cnidaria and ctenophora have these three germ layers . These animals are called triploblastic animals. Triploblastic animals are believed to have evolved from diploblastic animals between 580 and 650 million years ago. The triploblastic animals have become dominant on earth because of the advantages afforded by having a coelom. Forming a coelom oral body cavity protects the organs from external pressure, act as a cushioning fluid. Coelom also provides a hydrostatic skeleton for muscles to pull against, increasing the possibilities for strength and speed. The coelom also allows internal organs to develop at separate growth rates than the outer tissue layer of the body. All complex animals are triploblastic, but some triploblastic animals have become secondarily simplified and lost their coelom. Such animals are referred to as acoelomate.
Fate of Germ Layers in Triploblastic Animals :
1) Ectoderm: It is one of the three primary germinal layers, the other layers are the mesoderm and the endoderm. The ectoderm is an external layer of germ layers. The ectoderm develops the nervous system, external sensory organs of the hair and skin glands.
2) Mesoderm: The middle of the three primary germ layers of the embryo, found in between the ectoderm and endoderm. It forms the connective tissue, bone, cartilage, muscle, blood and blood vessels, lymphatics, lymphoid organs, notochord, pleura, pericardium, peritoneum, kidneys and gonads.
3) Endoderm: It is the innermost germ layers. From this layer the epithelium of the pharynx, respiratory tract (except the nose), digestive tract, bladder and urethra are formed.