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Extraembryonic Structures — Second Week & Germ Layers
Embryology Question Bank
Embryology Question Bank
Extraembryonic Structures
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Extraembryonic Structures MCQs: practice questions
Sample Extraembryonic Structures multiple-choice questions from Second Week & Germ Layers.
Which extraembryonic mesoderm layer is associated with the yolk sac?
- A. Extraembryonic somatic mesoderm
- B. Lateral mesoderm
- C. Extraembryonic visceral mesoderm
- D. Intermediate mesoderm
- E. Paraxial mesoderm
What is the relationship of extraembryonic visceral mesoderm to the yolk sac?
- A. It forms the neural tube
- B. It forms epidermis
- C. It surrounds the yolk sac
- D. It forms the amniotic cavity
- E. It becomes the placenta entirely
What is the significance of the yolk sac before mature placental circulation?
- A. It produces amniotic fluid only
- B. It participates in early nutrition and blood-cell formation
- C. It forms the neural tube
- D. It becomes the fetal liver
- E. It forms the maternal placenta
What is the main function of the amnion?
- A. It forms the placenta
- B. It produces gametes
- C. It forms maternal decidua
- D. It forms the chorionic cavity
- E. It forms the protective fluid-filled cavity around the embryo
What do embryonic blood islands produce?
- A. Amniotic fluid
- B. Trophoblast
- C. Somites and neural tubes
- D. Placental cotyledons
- E. Primitive blood vessels and embryonic blood cells
What is another name for the chorionic cavity?
What space forms within extraembryonic mesoderm?
What is the relationship of extraembryonic somatic mesoderm to the amnion?
What structure connects the embryoblast to the chorion?
What is added to primary chorionic villi to form secondary villi?
Which membrane forms the outer boundary of the extraembryonic coelom?
What does the chorion surround?
What is the chorion important for?
Which extraembryonic mesoderm layer is adjacent to the trophoblast?
What is the significance of extraembryonic mesoderm in week 2?
What is added to secondary villi to form tertiary villi?
What is the fetal component of the placenta derived from?
What is the chorion's relationship to the placenta?
What is the definitive chorion composed of?
What are primary chorionic villi composed of?
What are angioblasts?
Which extraembryonic structure later forms the fluid-filled sac around the fetus?
What is the maternal component of the placenta?
What is an important early function of the yolk sac?
Where does angiogenesis first occur in extraembryonic development?
What is the later contribution of the connecting stalk?
What divides extraembryonic mesoderm into somatic and visceral layers?
Which extraembryonic structure is an early site of hematopoiesis?
What is the key difference between somatic and visceral extraembryonic mesoderm?
What is extraembryonic mesoderm?