Understanding Embryonic Development and Its Importance in Human Growth

Embryonic development refers to the process by which a developing organism grows and forms its body parts, organs, and systems from the early stages of pregnancy until birth. This process involves the coordinated and highly regulated proliferation, differentiation, and morphogenesis of cells, tissues, and organs.

Embryonically derived tissues and structures are those that form during embryonic development and continue to function throughout an organism's lifetime. These tissues and structures include the nervous system, muscles, bones, cartilage, and other connective tissue.

In contrast, extra-embryonic tissues and structures develop outside of the embryo and are not directly involved in the formation of the body proper. Examples of extra-embryonic tissues include the placenta, amniotic sac, and umbilical cord, which provide nutrients, oxygen, and waste removal for the developing embryo.

Embryonally is an adverb that refers to the early stages of development, typically before the end of the eighth week of pregnancy. For example, "The embryonally developed limbs were visible on the ultrasound."