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Related Concept Videos

Whole Body Regeneration01:33

Whole Body Regeneration

Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential; even...
Pharynx01:20

Pharynx

The pharynx, a tubular structure framed by skeletal muscle and lined with mucous membrane, extends continuously from the nasal cavities. It is segmented into three major areas: the nasopharynx, oropharynx, and laryngopharynx.
Nasopharynx
The nasopharynx, bordered by the conchae of the nasal cavity, serves exclusively as an air conduit. In its superior region, the pharyngeal tonsils or adenoids are located. These tonsils are clusters of lymphoid reticular tissue akin to a lymph node. The precise...
Gastrulation01:56

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...
Overview of Regeneration and Repair01:19

Overview of Regeneration and Repair

Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
Regeneration
All animals have varying degrees of...
Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
Anatomy of Respiratory System I: Upper Respiratory Tract01:29

Anatomy of Respiratory System I: Upper Respiratory Tract

The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.

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Related Experiment Video

Updated: Jun 24, 2026

Chemical Amputation and Regeneration of the Pharynx in the Planarian Schmidtea mediterranea
06:14

Chemical Amputation and Regeneration of the Pharynx in the Planarian Schmidtea mediterranea

Published on: March 26, 2018

[Pharynx regeneration in planarians].

N D Kreshchenko

    Ontogenez
    |March 31, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Planarians can regenerate their pharynx, a complex organ, from small fragments. This regeneration process offers a valuable model for studying molecular mechanisms and testing compounds affecting morphogenesis.

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    Planarian Immobilization, Partial Irradiation, and Tissue Transplantation
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    Pharmacological and Functional Genetic Assays to Manipulate Regeneration of the Planarian Dugesia japonica

    Published on: August 31, 2011

    Related Experiment Videos

    Last Updated: Jun 24, 2026

    Chemical Amputation and Regeneration of the Pharynx in the Planarian Schmidtea mediterranea
    06:14

    Chemical Amputation and Regeneration of the Pharynx in the Planarian Schmidtea mediterranea

    Published on: March 26, 2018

    Planarian Immobilization, Partial Irradiation, and Tissue Transplantation
    10:09

    Planarian Immobilization, Partial Irradiation, and Tissue Transplantation

    Published on: August 6, 2012

    Pharmacological and Functional Genetic Assays to Manipulate Regeneration of the Planarian Dugesia japonica
    09:58

    Pharmacological and Functional Genetic Assays to Manipulate Regeneration of the Planarian Dugesia japonica

    Published on: August 31, 2011

    Area of Science:

    • * Developmental Biology
    • * Regenerative Medicine
    • * Invertebrate Zoology

    Context:

    • * Review of existing data on planarian pharynx regeneration.
    • * Planarians exhibit remarkable regenerative capabilities, restoring complex organs like the pharynx from fragments.
    • * The pharynx is a highly differentiated and functionally specialized organ.

    Purpose:

    • * To review and synthesize current knowledge on planarian pharynx regeneration.
    • * To highlight the theoretical significance of studying pharynx regeneration.
    • * To establish pharynx regeneration as a model for investigating undisclosed molecular mechanisms of regeneration and testing bioactive compounds for morphogenetic effects.

    Summary:

    • * Planarian regeneration extends to the complete restoration of the pharynx, a complex organ.
    • * Pharynx regeneration presents unique characteristics and significant theoretical interest.
    • * This process serves as a tractable model for exploring regeneration's molecular basis and evaluating compounds influencing morphogenesis.

    Impact:

    • * Provides a simplified yet adequate model for analyzing regeneration.
    • * Enables the use of large animal numbers and minimal substance quantities for research.
    • * Facilitates the discovery of molecular mechanisms underlying regeneration and the identification of compounds affecting morphogenesis.