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Related Concept Videos

Unrenewable Cells00:50

Unrenewable Cells

In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of their outer...
Overview of the Heart01:07

Overview of the Heart

The heart, a muscular organ located in the chest, functions as the body's pump, circulating blood through the vascular system. It has four chambers: two atria on top and two ventricles below. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and transfers it to the left ventricle, which pumps it to the rest of the body.
The heart's structure...
Heart Valves01:16

Heart Valves

The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
Heart Sounds01:15

Heart Sounds

Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
Renewal of Intestinal Stem Cells01:23

Renewal of Intestinal Stem Cells

The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the goblet,...

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Related Experiment Video

Updated: May 17, 2026

Using an Isolated Working Rat Heart Model to Test Donor Heart Preservation Strategies
06:56

Using an Isolated Working Rat Heart Model to Test Donor Heart Preservation Strategies

Published on: October 4, 2024

The heart's content-renewable resources.

Adèle Faucherre1, Chris Jopling

  • 1CNRS, UMR-5203, Institut de Génomique Fonctionnelle, Labex ICST, Montpellier F-34094, France.

International Journal of Cardiology
|October 10, 2012
PubMed
Summary
This summary is machine-generated.

This review explores two promising heart regeneration strategies: cardiac progenitor cells and adult cardiomyocyte proliferation. Understanding these distinct approaches is key to developing effective cardiac repair therapies.

Keywords:
Cardiac progenitor cellsCardiomyocyte proliferationHeart regeneration

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An Isolated Working Heart System for Large Animal Models
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Related Experiment Videos

Last Updated: May 17, 2026

Using an Isolated Working Rat Heart Model to Test Donor Heart Preservation Strategies
06:56

Using an Isolated Working Rat Heart Model to Test Donor Heart Preservation Strategies

Published on: October 4, 2024

Normothermic Ex Situ Heart Perfusion in Working Mode: Assessment of Cardiac Function and Metabolism
09:10

Normothermic Ex Situ Heart Perfusion in Working Mode: Assessment of Cardiac Function and Metabolism

Published on: January 12, 2019

An Isolated Working Heart System for Large Animal Models
09:45

An Isolated Working Heart System for Large Animal Models

Published on: June 11, 2014

Area of Science:

  • Regenerative Medicine
  • Cardiovascular Biology

Background:

  • Heart regeneration research encompasses stem cell therapy, xenografts, and bioengineering.
  • Significant promise exists for regenerating heart tissue damaged by ischemia/infarction.

Purpose of the Study:

  • This review focuses on two distinct regenerative strategies: cardiac progenitor cells and adult cardiomyocyte proliferation.
  • It aims to discuss the current understanding and principles behind these approaches for heart regeneration.

Main Methods:

  • Review of existing literature on cardiac progenitor cells and adult cardiomyocyte proliferation.
  • Analysis of the mechanisms by which these cell populations contribute to cardiac repair.

Main Results:

  • Cardiac progenitor cells are somatic stem cells within the adult heart capable of proliferation and differentiation.
  • Adult cardiomyocyte proliferation involves stimulating existing heart muscle cells to regenerate damaged tissue.

Conclusions:

  • Both cardiac progenitor cells and adult cardiomyocyte proliferation offer potential pathways for heart regeneration.
  • Further research into the specific stimuli required for each approach is crucial for therapeutic development.