embryonic development blastula

As the cells of the morula continue to divide, a cavity appears inside the morula. It forms the blastocoel. It separates a surface layer of blastomeres from an inner cell mass. The blastomeres on the surface of the embryo become flattened and form the trophoectoderm or trophoblast. This layer on fu..

All the events which change a zygote into a fully developed organism is called embryonic development. The entire process of development is called embryogenesis. Von Bear is called the "Father of Modern Embryology". Embryonic Development in..

The 3 germ layers give rise to definite organs and organ systems. The different organs formed from the different layers are Germ Layer - Structures formed Ectoderm - Epidermis, lens retina, internal ear, CNS, middle and posterior pituitary and pineal gland Mesoderm - Muscles, connective tissue, der..

In Eucoelomate bilaterally symmetrical animals, during the embryonic development, a slit called blastopore appears in the embryonic stage called blastula. The blastopore marks the beginning of antero-posterior elongation of the embryo. Based on the fate of bl..

Gastrulation is an important dynamic process in the development of the zygote which involves movement of cell masses from the surface of the blastula to their definitive positions in the embryo and their three primary germinal layers i.e., ectoderm, endoderm and mesoderm. These ..

It is well developed in reptiles, birds and prototherians. It is mainly digestive in function so it acts as an extra embryonic gut. In human beings it is vestigi..

Formation of 3 Germinal Layers - Gastrulation is an important dynamic process in the development of the zygote which involves movement of cell masses from the surface of the blastula to their definitive positions in the embryo and their three primary germinal layers i.e., ectode..

The embryonic tissue layers formed during developmental stages in Eumetazoa, are called germ layers. All the adult structures develop from these germ layers. Animals in which only two primary germ layers develop (an outer ectoderm and an inner endoderm) are described a..

Cell Division - Cell division forms a mode of reproduction in unicellular organisms. In multicellular organisms it is responsible for embryonic development and growth of the adult organism. It is also involved in repair and regeneration. Both asexual and sexual reproduction requ..

Pseudocoelomata In Pseudocoelomata a false body cavity is present. It is called pseudocoelom. It is a body cavity which is not lined by mesoderm. This condition is seen in round worms (Aschelminthes). It develops from the first formed embryonic body cavity called blastocoe..