Fetus
it takes four weeks for the organs of an embryo to form..
It depends on what organism the embryo comes from.
Lungs
The human embryo does not begin to exist in the mother's womb. Fertilization is one method of reproducing new human beings, and it takes place naturally in the woman's fallopian tube. The new human embryo then travels through the fallopian tube for about a week and then implants into the mother's womb. The embryonic period begins at fertiization and ends at the end of 8 weeks. The fetal period goes from the beginning of 9 weeks until birth.
The babies (embryo) heart starts to beat at about 4 weeks.
After fertilization, the fertilized egg undergoes cell division to form a blastocyst. The blastocyst then implants into the uterus and develops into an embryo. Over time, the embryo goes through various stages of development, including the formation of different tissues and organs, until it eventually becomes a fetus.
heart... I think
The instructions on how to build organs are located in the genetic material of the embryo, specifically the DNA. These instructions guide the development and differentiation of stem cells into specific cell types that eventually form the various organs in the body.
The term for a developing embryo is "embryogenesis." During this process, the fertilized egg undergoes cell division and differentiation to form the various tissues and organs of the organism.
The job of an embryo is to develop and grow into a fetus. During this stage, the embryo undergoes cell division and differentiation to form the various tissues and organs of the body. The embryo is also dependent on the mother's body for nutrients and oxygen to support its growth.
An embryo typically develops into a fetus around 8 weeks after fertilization. At this point, the major organs have begun to form and the fetus starts to resemble a human.
The inner cell mass of the blastocyst will undergo gastrulation and form the embryo. This inner cell mass consists of pluripotent cells that will give rise to the various tissues and organs of the developing embryo.