![]() Higher animals like chordates are deuterostomes. In protostomes, meaning mouth formed first, blastopore develops into the mouth, and in deuterostomes, meaning mouth formed second, blastopore develops into the anus. According to the development of blastopore, organisms are classified as protostomes and deuterostomes. Note:- Blastopore may either develop into the mouth or anus of the digestive tract. The coelom is the internal body cavity derived from the mesoderm, which is a fluid-filled space between the visceral organs and body wall. In humans, the development of three germ layers is seen, called triploblastic. In gastrulation, cells of the blastula move inward like an invagination forming different layers called the germ layers. Blastocoel is the fluid-filled cavity formed inside the blastocyst. A blastocyst is a mass of cells that is differentiated into an outer trophoblast and an inner embryoblast. Inside the blastula, there is the blastocyst. Blastopore may either develop into the mouth or anus of the digestive tract. Does the blastocoel become the archenteron When gastrulation begins, the cells at the blastula's vegetal pole move into the blastocoel, forming the blastopore. Later a second opening also develops in the gastrula. During gastrulation, the archenteron develops into the digestive tube (primitive gut), with blastopore becoming either anus or mouth depending on the organism. The area from where the cells folded inwards becomes the opening of the archenteron called the blastopore. The blastula folds inward to form the gastrula forming a gap called gastrocoel or archenteron. ![]() In the process of development among some animals (protostomatic), the blastopore becomes a mouth or forms both a mouth and an anal opening in others. It is a cavity formed during the gastrula stage of the embryo. (also protostomatic mouth, or gastropore), an opening by means of which the cavity of an animal embryo (in the gastrula stage) interacts with the surrounding environment. These stages differ in the number of cells and tissues in them.Īrchenteron can also be called a primitive digestive tube. The different stages are morula, blastula, gastrula, etc. The zygote undergoes mitotic division and slowly develops into a human foetus by passing through several stages. Hint:-A diploid zygote is formed by the fusion of a haploid sperm and haploid ovum.
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