BLASTODERMIC MEMBRANE Meaning and
Definition
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Blastodermic membrane refers to a specialized protective layer that forms during early embryonic development in some animals. Specifically, it is the membrane that surrounds the yolk sac or blastodisc at the beginning stages of embryogenesis.
The blastodermic membrane is crucial for the proper development and nourishment of the growing embryo. It is formed by a layer of cells that encloses the yolk or blastodisc, acting as a barrier between the growing embryo and the external environment. The membrane plays a significant role in providing mechanical support and protection to the developing embryo, shielding it from potential harm or damage.
In addition to its protective function, the blastodermic membrane also plays a vital role in the early nutritional support of the developing embryo. It assists in the transport of essential nutrients from the yolk or blastodisc to the growing embryo, ensuring its proper nourishment and growth during the initial stages of development.
In different animal species, the blastodermic membrane may have variations in structure and function. For instance, in birds, it forms the avian blastoderm, a distinct structure that becomes the basis for the development of the embryonic body. In other animals, the blastodermic membrane may differentiate into various tissue layers, contributing to the formation of different organs and structures. Overall, the blastodermic membrane is a critical component of early embryonic development, providing both protection and nourishment to the developing embryo.
Etymology of BLASTODERMIC MEMBRANE
The word "blastodermic membrane" is a compound term that can be broken down into two parts: "blastodermic" and "membrane".
The term "blastodermic" is derived from two Greek words: "blastos" meaning "germ" or "embryo" and "derma" meaning "skin" or "membrane". "Blastodermic" refers to the early developmental stage of an embryo, specifically the blastoderm or the layer of cells that forms on the surface of the yolk in bird or reptile eggs.
The word "membrane" is derived from the Latin word "membrana", which means "a thin layer" or "parchment". It refers to a thin, sheet-like structure that separates or lines different parts of an organism.
