Ectoderm
The nervous system generally begins to develop first in an embryo, followed by the formation of other systems such as the cardiovascular and musculoskeletal systems. The development of the nervous system is crucial for coordinating the growth and function of other organs and systems in the body.
Yes, an embryo is multicellular. After fertilization, the single-celled zygote undergoes a series of divisions, leading to the formation of a multicellular structure known as a blastocyst in mammals. This multicellular embryo continues to develop through various stages, eventually forming different tissues and organs.
uterus
Placenta.
Morula
An embryo sac is a structure found within the ovule of a flower where female gametophyte development takes place. It is a small sac-like structure that contains the egg cell along with other cells involved in the process of fertilization and seed formation.
A hail embryo is a small pellet of ice that forms within a thunderstorm as part of the hail formation process. It begins as a droplet of water that gets lifted by updrafts into extremely cold regions of the storm, where it freezes. As the embryo circulates within the storm, it can accumulate additional layers of ice before falling to the ground as hail. The size and structure of hailstones are influenced by the strength of the storm's updrafts and the duration of their formation.
The seed structure that stores food for the embryo is called the endosperm. It provides essential nutrients for the developing plant embryo to germinate and grow.
The term for the process of organ formation in an embryo is called "organogenesis." During organogenesis, the cells within the embryo differentiate and specialize to develop into the various organs and tissues of the body.
The inner cell mass of the blastocyst is the structure that becomes the embryo. It contains the cells that will develop into the fetus.
The formation of a human embryo is complete by the end of the eighth week of pregnancy. At this stage, all major organs and systems have formed, and the embryo is then referred to as a fetus.
The first system to form in a human embryo is the nervous system. The neural tube, which will develop into the brain and spinal cord, is one of the earliest structures to develop in the developing embryo.