UNIT+7-+EMBRYOLOGY

media type="custom" key="835943"media type="custom" key="836071" =__  Embryology   __=    __Embryology __- Embryology is the science dealing with the formation, development, structure, and functional activities of embryos. __Placenta __- The placenta is the embryo’s organ of respiration, nourishment, and excretion.  __Amniotic Egg__- The amniotic egg is the egg composed of shell and membranes that create a protected environment in which the embryo can develop out of water. __Cleavages__- The first few mitotic cell divisions in the zygote. __Germ Layers__- Ectoderm, Mesoderm, and Endoderm __Ectoderm__- Outside germ layer, develops into skin, and nervous system. __Mesoderm__- Middle layer, develops into the organs, muscles, and bones. __Endoderm__- Inner layer, develops into the liver, and glands. __Blastocyst__- When the embryo attatches to the uterine lining. __Amnion and Yolk Sac__- Structures that are found in a fetal heart and not found in a newborn's heart. __Branchial__- The thin layer that seperates the mothers blood from the baby's. __Branchial arch__- The structure the face forms. __Cartilge__- Membrane turning into bones. __Fontanelles__- Bone plates in the head that help it come out and let it grow. __Monozygotic twins__- Single egg cell, identical twins. __Dizygotic twins__- 2 egg cells, faternal twins. __Amniotic fluid__- Keeps the baby warm, keeps the baby's bones from fusing together, shock absorber, and lets the baby move easily.
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