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Questions and Answers
What does the phrase 'سبحانك ال علم لنا إال ما علمتنا' imply about human knowledge?
In which context is the term 'العليم الحكيم' used in the verse?
Which of the following best describes the relationship between divine knowledge and human knowledge as per the verse?
What is the implication of saying 'إنك أنت العليم الحكيم'?
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What is the primary theme conveyed through the verse from Surah Al-Baqarah?
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What is the fate of the allantois?
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What does the allantois develop into later in life?
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Which structure is directly linked to the hind gut?
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Which of the following statements is true regarding the allantois?
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What type of blood vessels form from the vitelline structures?
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What structures make up the definitive umbilical cord?
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Which of the following structures is responsible for the nutrition of the embryo?
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Which of the following components is NOT part of the umbilical cord structure?
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What is the function of Wharton's jelly in the umbilical cord?
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Which of the following is true regarding the umbilical blood vessels?
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What is indicated by the placenta completely covering the internal os?
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What is a potential consequence of PP centralis during labor?
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How might PP centralis affect fetal positioning?
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Which of the following is NOT a complication associated with PP centralis?
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What defines the condition of placenta previa?
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What structure does the allantois form during development?
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Which artery is formed from the vitelline arteries?
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What happens to the yolk stalk during embryonic development?
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What is a characteristic change that occurs in the right vein during early embryonic development?
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What occurs to the extra-embryonic coelom during development?
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Study Notes
Fate of Allantois
- The allantois begins as a small diverticulum connected to the hindgut.
- It transitions into the urachus and eventually the median umbilical ligament.
- The primary mesoderm surrounding the allantois forms the umbilical blood vessels.
Definitive Umbilical Cord
- The umbilical cord is made up of an amniotic membrane covering.
- It contains:
- Two umbilical arteries
- One umbilical vein
- Mucoid connective tissue (Wharton's jelly)
- Two remnants: the yolk stalk and extraembryonic celom
- These components together form the definitive umbilical cord.
Umbilical Vessels
- The two umbilical arteries and one umbilical vein are responsible for delivering nutrients to the developing embryo.
- The right umbilical vein degenerates early.
- The left umbilical vein remains and forms the ligamentum teres.
Development of the Umbilical Cord
- The allantois contributes to the formation of the median umbilical ligament.
- The yolk stalk disappears.
- The extraembryonic celom disappears.
- The vitelline arteries develop into the superior mesenteric artery.
Placenta Praevia Centralis (PP centralis)
- The placenta completely covers the internal os (opening of the cervix).
- This situation can lead to antepartum hemorrhage (bleeding before labor).
- It can also contribute to malposition of the fetus.
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Description
Explore the fascinating journey of the umbilical cord's development, including the role of the allantois, umbilical vessels, and key structures involved. This quiz covers the anatomical features and functions critical for the nourishment of the embryo. Test your knowledge on how these components contribute to embryonic development.