EVERYDAY SCIENCE

Detailed explanation-1: -The mesoderm forms the coelom, which is the body cavity. These organisms are complex due to the presence of a body cavity. Different organs are present in the body cavity.

Detailed explanation-2: -Derived from the mesoderm, the coelom is found between the intestinal canal and the body wall, lined with mesodermal epithelium. The mesodermal tissue also goes on to form the blood, bones, digestive tract, gonads, kidneys, and other organs. Organisms that possess a true coelom are called (true) coelomates.

Detailed explanation-3: -The germ layer mesoderm forms in the embryos of animals more complex than cnidarians, making them triploblastic. Mesoderm forms during gastrulation when some of the cells migrating inward to form the endoderm form an additional layer between the endoderm and the ectoderm.

Detailed explanation-4: -Triploblastic animals are the ones with three germ layers (a mesoderm as well as ectoderm and endoderm). The mesoderm allows them to develop true organs.

Detailed explanation-5: -The mesoderm forms mesenchyme, mesothelium, non-epithelial blood cells and coelomocytes. Mesothelium lines coeloms. Mesoderm forms the muscles in a process known as myogenesis, septa (cross-wise partitions) and mesenteries (length-wise partitions); and forms part of the gonads (the rest being the gametes).