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27 Cards in this Set
- Front
- Back
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What happens in the 15 day?
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Prechordal plate, primitive streak
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What is the function of prechordal plate?
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Organizer of the head
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What happens at the primitive streak?
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new cell appear, Endoderm, Mesoderm , ectoderm, which arise from epiblast
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What happens in primitive node during 16-17 days?
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Cells migrate cranially until they reach the prechordal plate
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What is the notochordal process during 18 days?
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Cellular tube that extends cranially from primitive node to prechordal plate
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What is the allantois?
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18th day diverticulum from the wall of yolk sac extending into the connecting stalk
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Where does primitive streak lie?
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On the surface of epiblast in the dorsal part of embryonic disc
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What is going on in primitive streak?
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differentiation of embryonic mesoderm and endoderm
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What is the notochord?
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It defines the primitive axis(spinal cord) of the embryo
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Always the blastocyst attaches the endometrium by the?
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embryonic pole.
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Blastocyst secretes substances which influence endometrium e.g?
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growth factors, cytokines, prostaglandins.
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What does progesterone do ?
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Prepares the endometrium for implantation,uterine glands growth
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What does trophoblast differentiate into after adhesion?
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Synctiotrophoblast, cytotrophoblast
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What does embryoblast(bilaminar embryonic disc) differentiate into and when?
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Epiblast,hypoblast, after 8 days
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Where does lacuna come from?
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Trophoblast
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What hormone does trophoblast produce?
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Human Chorionic gunadotropin-HCG
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What happens in the ninth day?
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Amnion, lacunas in trophoblast, primary yolk sac
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What happens in day 13-14day
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Secondary yolk sac is produced,Chorion,Endometrium undergo decidual reaction (changes in endometrium)
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When does anterior and posterior neural pore close?
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around 26 days
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What does NCC (neural crest cells) differentiate into?
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Mesenchymal cells
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What does mesenchymal cells build?
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bones and cartilage in head, Spinal ganglia,several regions of the heart and great vessels
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What does neuronal system consist of?
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Ganglia of cranial nerves 5,7,9,10, ganglia of the autonomic nervous system, lemmocytes (neurolemma sheaths)
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There parts after Neural differentiation?
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Neural plate, neural groove and neural crest cells
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What does myotome develop into?
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Skeletal musculator
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What does dermatome develop into?
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Dermis
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Sum upp what paraxial mesoderm eventually differentiate into?
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1 Skeletal muscles,
2 axial skeleton, 3 mesenchymal tissue(CT,fatty tissue, reticular tissue), 4 dermis |
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Sum upp what lateral mesoderm eventually differentiate into?
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1 Smooth muscle and CT of digestive tract,
2 serous membrane, 3 heart muscle 4 blood and lymph vessels 5 bone marrow 6spleen 7 adrenal cortex |
