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Related Concept Videos

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Gastrulation

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Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
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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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Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
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Development of the Lymphatic System01:15

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The development of lymphatic tissues and vessels in embryonic life begins around the fifth week. These structures originate from the mesoderm layer, with lymph sacs emerging from developing veins.
The first lymph sacs to form are the paired jugular lymph sacs located at the junction of the internal jugular and subclavian veins. From these sacs, lymphatic capillary plexuses extend to the thorax, upper limbs, neck, and head, eventually forming lymphatic vessels. Each jugular lymph sac maintains a...
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Development of the Sexual Organs in the Embryo and Fetus01:15

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Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
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Development of the Heart01:27

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The development of the human heart, a crucial organ, commences from the mesoderm on the 18th or 19th day after fertilization. This process initiates in the cardiogenic area, a group of mesodermal cells at the embryo's head end, which evolves into elongated strands known as cardiogenic cords. These cords undergo a transformation to form hollow-centered endocardial tubes.
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Updated: May 2, 2026

Three and Four-Dimensional Visualization and Analysis Approaches to Study Vertebrate Axial Elongation and Segmentation
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Vertebrate endoderm development.

Bailey A T Weatherbee1, Scott A Rankin1, Aaron M Zorn1,2

  • 1Division of Developmental Biology, Center for Stem Cell and Organoid Medicine, Cincinnati Children's Hospital Research Foundation, Cincinnati, OH 45229, USA.

Development (Cambridge, England)
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PubMed
Summary
This summary is machine-generated.

The endoderm, crucial for digestive and respiratory systems, is formed by conserved signaling pathways and transcription factors. Understanding its development aids in studying congenital disorders and advancing regenerative medicine.

Keywords:
Endoderm developmentOrganogenesisStem cellsVertebrates

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Area of Science:

  • Developmental biology
  • Stem cell biology
  • Regenerative medicine

Background:

  • The endoderm is the innermost embryonic germ layer, forming vital organs like the digestive and respiratory systems.
  • Endodermal organs perform critical functions including nutrient absorption, respiration, detoxification, and endocrine regulation.
  • Recent advances in vertebrate embryos and human pluripotent stem cells have elucidated endoderm formation mechanisms.

Purpose of the Study:

  • To define the mechanisms governing endoderm formation, regionalization, and organogenesis.
  • To understand the roles of cell signaling pathways and transcription factors in endodermal cell identity.
  • To explore how endoderm-mesoderm interactions influence tissue development and organ differentiation.

Main Methods:

  • Studying vertebrate embryos.
  • Utilizing human pluripotent stem cell models.
  • Analyzing conserved cell signaling pathways and lineage-specific transcription factors.

Main Results:

  • Identified conserved cell signaling pathways and transcription factors driving endoderm formation and regionalization.
  • Demonstrated the importance of endoderm-mesoderm interactions in guiding morphogenesis and differentiation.
  • Established fundamental principles of embryonic endoderm development.

Conclusions:

  • Insights into endoderm development inform the origins of congenital disorders.
  • Advances in understanding endoderm development support efforts in tissue engineering for regenerative medicine.
  • This research provides a foundation for disease modeling and therapeutic strategies.