Fetal membranes + gastrulation
Understanding Fetal Membranes and Gastrulation
This quiz is designed to test your knowledge of fetal membranes and the process of gastrulation. It covers key concepts, fun
- Assess your understanding of fetal membranes.
- Explore the role of the placenta in fetal development.
- Engage with questions on the process of gastrulation and germ layer formation.
Fetal membranes:
- Most of them are derived from the zygote
- Allantois is involved in early hematopoiesis
- Chorion is derived from the trophoblasts
- Are involved in gas exchange
- Amnion is derived from the epiblast
- Mediate in removal of metabolic product of embryo /fetus
- In general they do not form the embryo (with small expections)
- All of them are derived from zygote
- Chorion is derived from the embryonic
- Amnion is derived from the hypoblast
- Amnion is derived from the trophoblast
Chorion, find true
- Is included in formation of amnion
- Is part of yolk sac
- Is formed by cytotrophoblast
- Is included in formation of chorionc villi
- Is formed by synctiotrophoblast
- Secondary villus has a core made of ectoderm
- Is formed only by synctiotrophoblast
- Is formed by cyto- and syncytiotrophoblast
- Secondary villus has a core made by mesenchyme
- Is divided into smooth (leave) and villous (frondosum)
- Only branch, not stem villi are formed from chorion
- Is part of chorionic sac
Allantois, find true
- During the second month, the extraembryonic part of allantois degenerates
- Is a small diverticulum of the caudal part of yolk sac
- Together with yolk sac is included in formation of gut
- Gives rise to oogonia and spermatpgonia
- Differentiates in the ureter
- Can produce urine in prenatal life
- Its blood vessels persist in umbilical cord
- Is involved in early hematopeoiesis
To functions of placenta belong/belongs:
- Transfer gases
- Transfer carbon dioxide
- IgA transport
- Synthesis of LH
- Transfer oxygen
- Synthesis of immunoglobulins
- IgG transport
- Nutritional substance support
Functions of fetal membranes, find true:
- Yolk sac – its derivatives is an epithelium of the respiratory tract
- Yolk sac – source of primordial germ cells
- Allantois – formation of gut
- Amnion – early hematopoiesis
- Amnion – source of primordial germ cells
- Smooth chorion – fetal part of placenta
- Yolk sac – early hematopoiesis
Find the right matches:
- Yolk sac – its derivates is an epithelium of respiratory tract
- Amnion – early hematopoiesis
- Smooth chorion – fetal part of placenta
- Yolk sac – source of primordial germ cells
- Amnion – environment for embryo/fetus development
- Yolk sac – early hematopoiesis
- Allantois – formation of gut
Amnion – find true:
- Its amniotic fluid sac is filled with amniotic fluid
- Up to week 20 amniotic fluid is similar to fetal serum
- Fetus do not participate in production of fluid
- Is filled with about 2,5l of fluid
Yolk sac:
- Is derived from hypoblast
- Is involved in gut formation
- Primordial germ cells appear among the endodermal cells of its wall
- Primitive Yolk sac is fetal part of placenta
- Is responsible for nourishment of the embryo during first 4 month of development
- Is derived from epiblast
- Is responsible for the nourishment of the embryo during the early stages of development
- Is small and devoid of yolk
- Is lined by endoderm and mesenchyme
- Accumulates yolk
Yolk sac, find true:
- During the fourth week, the endoderm of yolk sac is incorporated into the ember as the primordial gut - The epithelium of the digestive tract, trachea, bronchi, lungs
- It gives rise to primordial germ cells
- Derived from hypoblast
- Is lined by endoderm and mesenchyme
- Primordial germ cells appear among the endodermal cells of its wall
- Involved in gut-formation
- In human, does not accumulate yolk
- Is involved in hematopoiesis
- Is involved in transfer of nutrients to embryo during 2nd and 3rd week
Gastrulation:
- Cells of epiblast form ectoderm
- Includes migration of cells
- Takes place in third week of embryo`s development
- Is process that establishes al three germ layers in embryo
- As its result, ectoderm, mesoderm and endoderm is being developed
- Begins with formation of primitive steak
- Is formation of epiblast layer and hypoblast layer
- Takes place in 6th week of embryos development
- Takes place in the first week of embryo`s development
- Ectoderm is formed during this process (not only)
- Takes place in 3rd week of embryos development
Gastrulation:
- Begins with formation of primitive steak
- Is process that establishes all three germ layers in embryo
- Take place in third week of embryo`s development
- Takes place in first week of development
- Takes place in 6th week of development
- Ectoderm is only formed during this process
- Cells of epiblast form ectoderm
- Includes migration cells
Mesoderm in gastrulation:
- Lateral divides into dermatome and myotom
- Intraembryonic is located between ectoderm and endoderm
- Lateral divides into: dermatome, myotom and sclerotom
- Pariaxial into dermatome, myotom and sclerotom
Development of three germ layers:
- Is called gastrulation
- Endoderm derives from extraembryonic mesoderm
- Intraembryonic mesoderm derives from epiblast
- Cells of epiblast migrate towards primitive streak
- Development of endoderm is first than invagination into epiblast layer
Somites:
- Establish the segmental organisation of the body.
- Derive from somitomers of lateral mesoderm
- Derive from somitomers of paraxial mesoderm
- Derive from endoderm
- At the end of gastrulation there are 17-20 of somites
- At the end of gastrulation there are ca. 50 of somites
Mesoderm:
- Cornea develops from intermediate mesoderm
- Intermediate divides into: dermatome, myotom and sclerotom
- Intraembryonic is located between ectoderm and endoderm.
- Lateral divides into dermatome and myotome
- Lateral divides into: dermatome, myotome and sclerotome (paraxial
- Mesenchyme develops from sclerotom
- Pariaxial divides into: dermatome, myotome and sclerotome.
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