Allantois is a part of a developing animal embryo. This sac-like structure is primarily involved in respiration and excretion, and is webbed with blood vessels. It is primarily found in the blastocyst stage of early embryological development, and its purpose is to collect liquid waste from the embryo. ...more on Wikipedia about "Allantois"
The aorta-gonad-mesonephros is a region of embryonic mesoderm that develops during embryonic development from the para-aortic splanchnopleura in chick, mouse and human embryos. It has been suggested that this area, in particular the ventral wall of the dorsal aorta, is the one of the primary orgins of the definitive haematopoietic stem cell. ...more on Wikipedia about "Aorta-gonad-mesonephros"
A blastomere is a type of cell produced by division of the egg after fertilization. ...more on Wikipedia about "Blastomere"
A Blastosphere is the hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum. ...more on Wikipedia about "Blastosphere"
The brachyury mutation was first described in mice in 1927 as a mutation that affected the tail length in heterozygous animals and was lethal in homozygous animals due to defects in notochord differentiation and the abscence of structures posterior to the forlimb bud. ...more on Wikipedia about "Brachyury"
The dorsal nerve cord is one of the embryonic features unique to chordates, along with a notochord and pharyngeal slits. The dorsal nerve cord is a hollow cord dorsal to the notochord. It is formed from a part of the ectoderm that rolls, forming the hollow tube, compared to other animal phyla, which have solid, ventral tubes. The dorsal nerve cord is later modified into the brain and spinal cord. ...more on Wikipedia about "Dorsal nerve cord"
Embryogenesis is the process by which the embryo is formed and develops. It starts with the fertilization of the ovum, which is then called a zygote. The zygote undergoes rapid mitotic divisions with no significant growth (a process known as cleavage) and cellular differentiation, leading to development of an embryo. It occurs in both animal and plant development, but this article addresses the common features among different animals. ...more on Wikipedia about "Embryogenesis" http://www.shortopedia.com - Go in quickly. shortopedia
Embryology is the branch of developmental biology that studies embryos and their development. The formation and development of an embryo is known as embryogenesis. This is related to biochemistry because life forms that are developed with similar biochemistries undergo embryogenesis. There has been much contraversy over ivf and genetic engineering and designer babies as an almost consumer product. ...more on Wikipedia about "Embryology"
Fetal Fibronectin (fFN) is a protein produced by fetal cells. fFN is found at the interface of the chorion and the decidua (between the fetal sack and the uterine lining). It's characteristics are basically adhesive for most of the pregnancy and it is likely to be the "biological glue" that binds the fetal sack to the uterine lining. Because of this fFN has become an excellent biological marker to indicate likelihood of premature (preterm) delivery, less than 37 weeks gestation. ...more on Wikipedia about "Fetal Fibronectin"
A few weeks after fertilization, the initial appearance of the human fetal genitalia is basically feminine: a pair of " urogenital folds" with a small protuberance in the middle, and the urethra behind the protuberance. ...more on Wikipedia about "Fetal genital development"
The fetal pole is a thickening on the margin of the yolk sac of a fetus during pregnancy. ...more on Wikipedia about "Fetal pole"
A genital tubercle is a body of tissue which forms in the ventral, caudal region of mammalian embryos of both sexes, and eventually develops into a phallus. In the human fetus the genital tubercle develops around week 4 of gestation, and by week 9 becomes recognizably either a clitoris or penis. ...more on Wikipedia about "Genital tubercle"
The gubernaculum is a fold of peritoneum which attaches to the caudal end of the testes. As the scrotum forms, the gubernaculum causes the descent of the testes through the inguinal canal. ...more on Wikipedia about "Gubernaculum"
Histogenesis is defined as "the formation of tissues and organs from undifferentiated cells" (Encarta Dictionary). ...more on Wikipedia about "Histogenesis" You've Got Questions. We've Got shortopedia.
Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the uterine tube. ...more on Wikipedia about "Human fertilization"
The interatrial septum is the wall of tissue that separates the right and left atria of the heart. ...more on Wikipedia about "Interatrial septum"
Found in cows and sheep, Interferon tau is the signal from the developing embryo to the mother that she is pregnant. It is secreted by the trophoblast cells into the uterine lumen in days 13-21 of pregnancy. It decreases luteal oxytocin receptors, which then cannot stimulate PGF-2-alpha synthesis, preventing luteolysis. It promotes uterine implantation by increasing protein synthesis in glands. ...more on Wikipedia about "Interferon tau"
The mesonephros ( Latin for "middle kidney") is one of three excretory organs that develop in vertebrates. It serves as the main excretory organ of aquatic vertebrates and as a temporary kidney in higher vertebrates. The mesonephros is also called the Wolffian body after Caspar Friedrich Wolff who described it in 1759. ...more on Wikipedia about "Mesonephros"
A morula ( Latin "morus", mulberry) is an embryo at an early stage of embryonic development, consisting of approximately 4-16 cells (called blastomeres). The morula is produced by embryonic cleavage, the rapid cell division of the zygote. The morula is a solid ball of cells; the inner blastomeres are called the "inner cell mass" and the blastomeres on the surface are called the "outer cell mass." The morula travels to the uterus, and at about 4 days after fertilization a fluid-filled space called the blastocystic cavity appears and the morula becomes a " blastocyst." ...more on Wikipedia about "Morula"
The Müllerian ducts are paired ducts of the embryo which empty into the cloaca, and which in the female develop into the upper vagina, cervix, uterus and oviducts; in the male they disappear except for the vestigial vagina masculina and the appendix testis. ...more on Wikipedia about "Müllerian duct"
The neural crest, a component of the ectoderm, is one of several ridgelike clusters of cells found on either side of the neural tube in vertebrate embryos. It has been referred to as the fourth germ layer, due to its great importance. During development, these cells migrate extensively to yield a wide range of cell types and structures, including: ...more on Wikipedia about "Neural crest" Things go better with http://www.shortopedia.com. shortopedia
The neural plate is thick and flat bundle of ectoderm which develops in the embryo into the nervous system. In the development sequence, the neural plate forms the neural tube which then forms the CNS ( central nervous system), comprised by the spinal cord and the brain. Masses of tissue called the neural crest separate from the neural tube and form the cord's sensory neurons, eventually coming to be the PNS ( peripheral nervous system). ...more on Wikipedia about "Neural plate"
The neural tube is the embryonal structure that gives rise to the brain and spinal cord. The neural tube is derived from a thickened area of ectoderm, the neural plate. The process of formation of the neural tube is called neurulation. ...more on Wikipedia about "Neural tube"
Neuromeres are transient segments during the early development of the human brain. Around the fifth week of biological development, there are 15 visible neuromeres. ...more on Wikipedia about "Neuromere"
A Neurula is an embryo at the early stage of development in which neurulation occurs. Neurulation is the development of the nervous system in the embryo, at the thickened area above the notochord in ectoderms. The neural plate will fold to produce the neural tube which will develop into the brain. Remaining tissue will develop into the spinal cord. ...more on Wikipedia about "Neurula"
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