# data[].attributes.attachment_link.entities[].name
Primal Anatomy & Physiology Online Course

# data[].attributes.attachment_link.title
General Embryology - Detailed Animation On Gastrulation

# data[].attributes.attachment_link.description
Animation is derived from Primal Anatomy & Physiology Online Course. You may purchase the course at http://primalonlinelearning.com/ By the end of the second week of development, the bilaminar embryonic disc, consisting of the hypoblast and epiblast, has formed. Throughout the third week of development, this bilaminar disc differentiates to establish three primary germ layers, in a process known as gastrulation.

# data[].attributes.body
When cells begin to differentiate to more specific functions

# data[].attributes.attachment_link.description
A brief segment of a a cell division video showing how cell begin dividing and specializing after fertilization

# data[].attributes.body
When cells split within an ovum.

# data[].attributes.body
The umbilical cord connects to the placenta, and exchanges nutrients, oxygen, and waste.

# data[].attributes.body
The yolk sac is the little sac outside of the embryo's body. This is what allows the baby to have a different blood type from the mother. The yolk sac substitutes the long bones (which in babies and older make red blood cells).

# data[].attributes.body
The amniotic sac and fluid is essentially what protects the baby. It acts as a cushion to keep the baby from being squished or bumped around.

# data[].attributes.body
Totipotent: These stem cells come from the morula, they are completely free to become whatever is needed.
Pluripotent: These cells are a little more restricted, coming from the Extra-embryonic layers. These can become things assigned to the layers. (Endo, ecto, meso)
Multipotent: These cells can only become specific things. Example is when a cell becomes endodermic, it can only be any gastrointestinal cells, or any other inner organ, excluding the heart and nervous system.

# data[].attributes.body
The placenta acts as a barrier between the mother and fetus. This is an organ that sustains progesterone and estrogen levels, as well as exchanging waste, nutrients, and oxygen from mother to fetus and vice versa.

# data[].attributes.body
Implantation is when the blastocyst attaches to the uterine wall, and starts to differentiate cells.

# data[].attributes.body
Fertilization occurs when A sperm successfully penetrates the outer walls of an ova. This turns it into a zygote.

# data[].attributes.attachment_link.description
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.

# data[].attributes.body
HCG is the pregnancy hormone that pregnancy tests detect. HCG keeps estrogen and progesterone levels high so as to preserve the uterine walls (Endometrium) and promote implantation.

# data[].attributes.body
The allantois eventually connects to the fetus, and becomes the umbilical cord. This connects to the placenta; the organ which exchanges nutrients, waste, and oxygen between mom and fetus.

# data[].attributes.body
The amnion becomes the amniotic sac, which is filled with fluid. This protects the fetus from external damage, and acts as a cushion.

# data[].attributes.body
The chorion is what eventually becomes the placenta. This membrane preserves the corpus luteum, and as a result, progesterone and estrogen levels stay high. This is so a period does not take place.

# data[].attributes.body
The blastocyst membranes will eventually make up what supports the fetus' life.

# data[].attributes.body
The endoderm creates the GI tract, liver, respiratory tract, pancreas, thyroid, and other inner organs.

# data[].attributes.body
The mesoderm of the embryoblast makes up muscle, bone, blood, reproductive structures, connective tissues, and the heart.

# data[].attributes.body
The ectoderm of the embryoblast makes up the Nervous system, teeth, mouth, skin, hair, and other things on the outside.

# data[].attributes.body
Inner cells of the blastocyst. This becomes the actual embryo (Baby)

# data[].attributes.body
The Blastocyst attaches to the uterine wall, and from there begins to differentiate.

# data[].attributes.body
The morula is a group of non-differentiated cells, between 8-16 cells. This is the peak of cleavage, but still before implantation.

# data[].attributes.body
A zygote is a fertilized ovum. This cell has cleavage but without growth or differentiation.