what is embryos. write it's application 12th
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Answer:
a new organism in the earliest stage of development. In humans this is defined as the developing organism from the fourth day after fertilization to the end of the eighth week. After that the unborn baby is usually referred to as the fetus. adj., adj em´bryonal, embryon´ic.
Immediately after fertilization takes place, cell division begins and progresses at a rapid rate. At approximately 4 weeks the cell mass becomes a recognizable embryo from 7 to 10 mm long with rudimentary organs. The beginnings of the eyes, ears, and extremities can be seen. By the end of the second month the embryo has grown to a length of 2 to 2.5 cm, and the head is the most prominent part because of the rapid development of the brain; the sex can be distinguished at this stage.
At the time of fertilization the ovum contains the potential beginnings of a human being. As cell division takes place the cells of the blastoderm (embryonic disk) gradually form three layers from which all the body structures develop. The ectoderm (outer layer) gives rise to the epidermis of the skin and its appendages, and to the nervous system. The mesoderm (middle layer) develops into muscle, connective tissue, the circulatory organs, circulating lymph and blood cells, endothelial tissues within the closed vessels and cavities, and the epithelium portion of the urogenital system. From the endoderm (internal layer) are derived those portions not arising from the ectoderm, the liver, the pancreas, and the lungs.
Explanation:
Answer:
Your ans will be:
Explanation:
An embryo is the earliest stage in the development of a fertilised egg (the zygote). It is the term used for any animal or plant, from the first cell division until birth, or hatching, or germination in plants. ...
It's application are:
Isolation of hybrid embryos at the immature stage i.e., before abortion and their culture in vitro may circumvent strong post-zygotic barriers. To raise the rare hybrids by rescuing embryos from incompatible crosses is the most popular application of embryo culture.
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