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Development of Blood Vessels01:07

Development of Blood Vessels

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The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
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Related Experiment Video

Updated: Oct 15, 2025

Dissection and Explant Culture of Murine Allantois for the In Vitro Analysis of Allantoic Attachment
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Development of the Mouse Placenta.

Sourav Panja1, Bibhash C Paria2

  • 1Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA.

Advances in Anatomy, Embryology, and Cell Biology
|October 25, 2021
PubMed
Summary

The placenta is a temporary organ essential for pregnancy, supporting fetal development through complex functions. Understanding its formation and function is key to preventing pregnancy complications.

Keywords:
BlastocystDeciduaImplantationLabyrinthPlacenta

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Area of Science:

  • Reproductive Biology
  • Developmental Biology
  • Obstetrics

Background:

  • The placenta is a transient, discoid-shaped organ formed during pregnancy.
  • It comprises both maternal and embryonic tissues, developing after blastocyst implantation.
  • Its formation and development are synchronized with embryonic stages.

Purpose of the Study:

  • To elucidate the formation, maturation, and functional mechanisms of the placenta.
  • To investigate the underlying processes of placental development and function.
  • To identify potential targets for preventing placenta-related pregnancy issues.

Main Methods:

  • Review of existing literature on placental development and function.
  • Analysis of structural and functional aspects of the placenta.
  • Correlation of placental development with embryonic growth stages.

Main Results:

  • The placenta gradually acquires vital functions including vascular, respiratory, hepatic, renal, endocrine, gastrointestinal, immune, and barrier roles.
  • These functions are crucial for fetal development, growth, and safety.
  • The placenta is expelled after fulfilling its supportive role in fetal survival.

Conclusions:

  • Despite its critical role, the precise mechanisms of placental formation, maturation, function, and failure remain incompletely understood.
  • A comprehensive understanding of normal placental development is essential for mitigating pregnancy complications.
  • Further research into placental biology may improve maternal and fetal health outcomes.