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Determination

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...

Gastrulation

Gastrulation

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 will form...

Development of the Sexual Organs in the Embryo and Fetus

Development of the Sexual Organs in the Embryo and Fetus

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.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...

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Related Experiment Video

Updated: Jun 18, 2026

In Utero Intra-cardiac Tomato-lectin Injections on Mouse Embryos to Gauge Renal Blood Flow

In Utero Intra-cardiac Tomato-lectin Injections on Mouse Embryos to Gauge Renal Blood Flow

Published on: February 4, 2015

Advances in early kidney specification, development and patterning.

Gregory R Dressler¹

¹Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA. dressler@umich.edu

Development (Cambridge, England)

|November 13, 2009

Summary

This summary is machine-generated.

Kidney development involves precise cell patterning and organ formation. Recent research reveals how key molecular signals guide renal stem cell renewal and kidney structure formation.

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Isolation and Culture of Cells from the Nephrogenic Zone of the Embryonic Mouse Kidney

Isolation and Culture of Cells from the Nephrogenic Zone of the Embryonic Mouse Kidney

Published on: April 22, 2011

Related Experiment Videos

Last Updated: Jun 18, 2026

In Utero Intra-cardiac Tomato-lectin Injections on Mouse Embryos to Gauge Renal Blood Flow

In Utero Intra-cardiac Tomato-lectin Injections on Mouse Embryos to Gauge Renal Blood Flow

Published on: February 4, 2015

Isolation and Culture of Cells from the Nephrogenic Zone of the Embryonic Mouse Kidney

Isolation and Culture of Cells from the Nephrogenic Zone of the Embryonic Mouse Kidney

Published on: April 22, 2011

Area of Science:

Developmental biology
Organogenesis
Renal biology

Background:

The kidney serves as a key model for studying mesodermal patterning and organogenesis.
Kidney development requires precise spatial and temporal regulation of cell behaviors along multiple axes.
Understanding the molecular mechanisms governing kidney formation is crucial for regenerative medicine and treating congenital kidney diseases.

Purpose of the Study:

To review recent advancements in understanding kidney development.
To highlight the roles of intrinsic nuclear factors and secreted signaling molecules in renal organogenesis.
To discuss how these findings advance the comprehension of kidney development.

Main Methods:

Literature review of recent research in kidney development.
Analysis of intrinsic nuclear factors and secreted signaling molecules.
Discussion of cell proliferation, differentiation, and tissue integration.

Main Results:

Intrinsic nuclear factors and secreted signaling molecules are essential for specifying renal epithelial stem cells and their self-renewal.
These molecular signals drive branching morphogenesis and nephron patterning during kidney development.
Progress has been made in understanding the complex dynamics of epithelial cell behavior.

Conclusions:

Recent findings have significantly advanced our understanding of kidney development.
The interplay of intrinsic and extrinsic factors is critical for proper kidney formation.
Further research in this area holds promise for therapeutic interventions in kidney diseases.