30 Questions
What is the fate of the cells that move downward and to the sides in the primitive node when cut cross-sectionally?
Displace hypoblast to form endoderm
In the formation of the notochord, what cells become intercalated with endodermal cells initially?
Prenotochordal cells
What is the origin of the notochordal plate that gets intercalated with endodermal cells?
Mesoderm
Which embryonic germ layer do the ingressing cells become in the process described?
Mesoderm
What are the three embryonic germ layers formed as a result of the migration and displacement processes?
Ectoderm, Endoderm, Mesoderm
What determines the cranial to caudal sequence of formation of the definitive notochord?
Progression of formation from cephalic to caudal region
Which tissue will eventually differentiate to form the epicardium and myocardium of the heart?
Mesenchymal cells
What will the mesenchymal cells derived from the splanchnic mesoderm give rise to in blood vessels?
Blood corpuscles
Which structure will arise from the intermediate mesoderm and be part of the urogenital units?
Renal pelvis
What will differentiate to form the visceral peritoneum of the peritoneal cavity?
Mesenchymal cells
Which cells will give rise to the collecting tubules of the kidney?
Mesenchymal cells
Which mesodermal structure gives rise to the muscles of the trunk and limbs?
Paraxial mesoderm
In the intermediate mesoderm, what structures will persist if the embryo is female?
Mullerian ducts
Which mesodermal component participates in the formation of the vertebrae or the axial skeleton?
Sclerotome
Which system arises mainly from ectoderm according to the provided text?
Nervous system
Endocrine glands like the pituitary gland primarily arise from which germ layer?
Ectoderm
'Mesonephric ducts will form the ductus epididymis and ductus deferens' is a statement related to which sex's embryo according to the text?
Male
What is the primary function of the chorionic folds in swine?
Aiding in nutrient exchange between the mother and fetus
In which species does the chorion develop into primary, secondary, and tertiary villi?
Primates
What happens in the labyrinthine architecture of rodents?
Merging of chorionic villi surrounding maternal blood lacunae
What role does the uterine epithelium play in the placental complex formation?
Acting as a barrier against harmful substances
Which layer is involved in the initial formation of the placenta complex?
Perimetrium
What characterizes the chorionic epithelium's interaction with maternal tissues?
Establishment of primary, secondary, and tertiary villi
Which extraembryonic membrane is responsible for temporarily and permanently providing care and maintenance of the embryo?
Amnion
What is the origin of the extraembryonic mesoderm in the chorion?
Splanchnopleuric
Which outgrowth is an extension of the hindgut and is lined with endoderm fused with extraembryonic mesoderm?
Allantois
During embryonic development, which cells spread outward from the region of the embryo to become the extraembryonic mesoderm?
Mesenchymal cells
What embryonic structure forms a hood above the developing embryo?
Amnion
Which layer forms the outermost part of the chorion?
Ectoderm
What is the function of the yolk sac during embryonic development?
Nourishment
Test your knowledge on the primitive node and prenotochordal cells by understanding their role in cell invagination and migration. Learn how cells move downward in the hypoblast layer, displacing it to the side and forming a yolk sac upon cross-section cutting.
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