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Change that occurs in identical embryonic cells to become distinct structurally and functionally.

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Multipotent stem cells are cells that have the capacity to self-renew through division and development of multiple specialized cells.

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(of an immature or stem cell) Capability of giving rise to seven different types of cells.

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The ability to differ into all cell types. The zygote and early embryonic cells are totipotent since they can differentiate into any cell type during development.

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The first stage of embryo-genesis. Cleavage is the duplication of mitotic division of a zygote into blastomeres that cluster to form a mass called morula. Cleavage happens until the blastula is created.

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Attachment of a fertilized to the uterine lining, which happens approximately after conception.

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Human Physiology - Fertilization and Implantation

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Causes an organism to develop its shape. It causes development of specific tissue structures or differing form caused by embryonic cell migration and inductive interactions.

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Happens during embryonic development that changes the embryo from a blastula with a single layer of cells to a gastrula containing multiple layers of cells. It is a crucial time in the development of multi cellular animals. With the movement of gastrulation cells are brought to new positions so that they can interact with cells that were not there initially.

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The act or process of fertilizing an egg, a female animal, or plant, involving the fusion of male and female gametes to form a zygote.

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The process of fertilization and the formation of human.flv

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A flexible, often spirally twisted, tube that is attached to the abdomen of a fetus to the mothers placenta in the uterus, and through which nutrients are brought and waste is expelled.

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Morula is used to describe a zygote when it develops into a 16-cell sphere.

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In most pregnant mammals, a disk-shaped organ within the uterus that is rich in blood vessels, ; connects the embryo or fetus to the uterine wall and facilitates metabolic change.

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One of the two main periods of prenatal development, taking place over the first eight weeks of the first trimester. During that time the cells divide and are redistributed, and tissues and organs form, as well as the structures that support and nourish the developing embryo.

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A gastrula is an embryo at the stage following the blastula, when it is a hollow cup-shaped structure having three layers of cells.

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A sac that is attached to the gut of an embryo that isolates the yolk in bony fish, sharks, reptiles, mammals, and birds. In most mammals, the yolk sac functions as part of the embryos circulatory system before the placenta grows.

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Is the outermost of the two fetal membranes that surrounds the embryo. The chorion develops villi and goes into the placenta.

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The innermost part of the primary germ layers of an animal embryo. The endoderm helps with the development of the respiratory tract, gastrointestinal tract, glands associated with the gastrointestinal tract, bladder, and urethra.

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The amnion is a part of the membranes that are around the developing embryo or fetus. It is a membrane that closely covers the embryo when it is first created. It fills with the amniotic fluid which makes the amnion expand and become the developing sac which is for providing a protective environment for the developing embryo or fetus.

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The ICM is a mass of cells inside the primordial embryo that will eventually turn into the structures of the fetus.

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An extra-embryonic membrane of reptiles, birds, and mammals arising as a pouch, or sac from the hindgut. In reptiles and birds it expands greatly between two other membranes, the amnion and chorion, to serve as a temporary respiratory organ while its cavity stores fetal excretions.

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Structure that is formed in the early development of mammals. It has an inner mass that forms the embryo and the outer layer consists of cells collectively called the trophoblast.

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The layers enclosing the embryo inside the uterus There are four layers which are the amnion, yolk sac, allantois, and chorion.

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The germ layers develop early in embryonic life, through the process gastrulation. In the process of gastrulation, a hollow bundle of cells called a blastula reorganizes into two main germ layers the inner layer (endoderm) and an outer layer (ectoderm).

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A germ layer that is present in an animal embryo and will turn into specialized tissue types. It is one of the three germ layers that are found in triploblastic organisms. The area that it is located is between the ectoderm and endoderm.

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The cell formed by a male sex cell (Sperm) and a female sex cell (ovum). The process of the sperm and ovum being fused together to create a zygote.

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Ectoderm is one of the 3 primary germ layers in the very early embryo. It gives rise to the outermost structures such as hair, skin, nails, or hooves, and the lens of the eye.It also includes the sense organs; nasal cavity, the sinuses, the mouth and the anal canal.

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A human hormone made by Chorionic cells in the fetal part of the placenta. hCG is directed at the gonads and stimulates them.