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A specific cell inside a germ layer. Being able to differentiate one kind of cell in an organ and switching it into a different type of cell in an organ. Example would be switching a red blood cell into a white blood cell.

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Cells that are separated into their germ layers, but could be switched. For example being able to a hair cell from the ectoderm and turning it into a tooth cell for the ectoderm.

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A blank cell that hasn't differrentiated yet. These cells are only present until the morula phase

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The umbilical eventually grows from the allantois membrane and it connects the baby to the placenta

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Fertilization happens in the Fallopian tubes in a woman, but by the time but a blastocyte is from, the chorion layer will "stick" itself on the endometruim lining of the uterus.

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Morphogenesis is the organization of cells into a body plan. The genetic blue print

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The placenta eventually grows where the chorion joined with the endometruim. It takes over the role of HCG in mostly keeping the baby alive for the second and third trimester. It exchanges wastes and nutrients between the mother and embryo and regulates hormones

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Embryos are constantly growing and becoming more complex

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A sac attached to the embryo which creates blood cells until bone marrow is mature enough to start making blood cells

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Forms the inner most structures in the body. Mostly organs.

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Forms mostly inner forms of the body like muscle and blood.

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Forms mostly outter forms of the body like hair skin and teeth, and the nervous system.

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Inside the embryoblast there are three ,layers of germ layers. All of these layers grows new parts to the embryo.

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Cells start to get thier own job instead of just being a blank cell

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The formation of distinct germ layers

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Inside the embryoblast you will find the inner cell mass. These inside cells will go through gastrulation and develop germ layers, and eventually it becomes the fetus

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HCG is a hormone that maintains the corpus luteum, which increases secretion of the estrogen and progesterone hormones. This hormone keeps the baby alive for the first three months (first trimester) after fertilization.

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This membrane doesn't surround the embryo. Instead it connects the fetus to the placenta, and it eventually becomes the unbelical cord. It helps the yolk sac create blood cells.

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Fluid filled sac the encloses the fetus. The amnion protects the developing embryo, and it also keeps the embryo at a good temperature. Eventually the baby will drink and urinate into the fluid.

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Outermost layer of the blastocyte. Like velcro the chorion causes the blastocyte to stick to the endometrium in the uterus and it eventually develops into the placenta wall. It also secrets HCG

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Once cells start to differentiate, there are three membranes surrounding the embyoblast (which soon becomes the embryo). These three membranes are called chorion, aminion, and allantois

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Once in the Blastocyst phase, the cells begin to differentiate and get jobs. In the diagram for the most part  the blue part is called the embryoblast and the green shows the outermost embryonic membrane

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Very similar to a zygote, the process of cleavage turns into a 8-16 cell morula

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Cleavage is a process that causes cells to split quickly, but there is no cell growth.

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Evolutionary Morphology of Vertebrates UGent

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Uploaded by Evolutionary Morphology of Vertebrates UGent on 2016-03-03.

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The process of fertilization creates a zygote. It has 46 chromosomes

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The process when a sperm meets the ovum, which creates a zygote. Usually happens in the Fallopian tube. Go to 0:50 in the video to see fertilization

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A short scientific animation of the journey of the sperm cell when fertilizing the egg. The backgrounds/environments were modelled & textured in Zbrush. The sperm cells were animated in Modo, using dynamic curves, replicators and particles. The rendered output was composited in Fusion 7 and Hitfilm 3 Pro.