Early development of an individual from a fertilized egg (zygote). Following cleavage of the zygote, the major axes are established during the blastula stage; in the subsequent gastrula stage, the early embryo invaginates and acquires three cell layers. ( Figure 23-5)
the development and growth of an embryo. Endothermic (also homeothermic or warm-blooded) - having ability to maintain constant body temperature in different ambient temperatures.
Development of an embryo from a fertilized egg, or zygote.
That phase of prenatal development involved in establishment of the characteristic configuration of the body of the embryo; in humans, embryogenesis is usually regarded as extending from the end of the second week to the end of the eighth week, after which the product of conception is usually spoken of as a fetus. (Based on SMD)
The processes leading to the development of an embryo from egg to completion of the embryonic stage.
Formation and development of an embryo, which is the stage in the developing mammal at which organs and organ systems are being formed. In humans, this is usually considered to cover the period from the end of the second week of gestation until the end of the eighth week.
in humans, this is the phase of prenatal development wherein an embryo develops and is usually considered to cover the period from the end of the second week of gestation until the end of the 8th week at which time the term "fetus" is used to describe the developing individual.
The process of embryo initiation and development.
Embryogenesis is the process by which the embryo is formed and develops. It starts with the fertilization of the ovum, egg, which, after fertilization, is then called a zygote. The zygote undergoes rapid mitotic divisions, the formation of two exact genetic replicates of the original cell, with no significant growth, a process known as cleavage) and cellular differentiation, leading to development of an embryo.
