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Related Concept Videos

Regulation of Heart Rates01:31

Regulation of Heart Rates

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The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
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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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Conduction System of the Heart01:19

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Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
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Conduction System of the Heart01:20

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The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
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Regulation of the Cardiovascular System01:27

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The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
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Anatomy of the Heart01:27

Anatomy of the Heart

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The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
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Related Experiment Video

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In Vitro Generation of Heart Field-specific Cardiac Progenitor Cells
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Genetic networks governing heart development.

Ashley J Waardenberg1, Mirana Ramialison2, Romaric Bouveret3

  • 1Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales 2010, Australia.

Cold Spring Harbor Perspectives in Medicine
|October 5, 2014
PubMed
Summary
This summary is machine-generated.

Understanding gene regulatory networks is key to organismal development and disease. This review explores systems biology approaches to deciphering complex genetic codes, focusing on heart development.

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Area of Science:

  • Genomics and Developmental Biology
  • Systems Biology
  • Molecular Biology

Background:

  • Animal genomes encode the blueprint for body plan development from a single cell.
  • Deciphering how genome information creates complex gene regulatory networks is a major challenge in biological sciences.
  • Altered gene regulatory networks are implicated in various diseases.

Purpose of the Study:

  • To introduce the principles of systems biology.
  • To review advancements in understanding heart development using a systems biology framework.
  • To highlight the importance of effective methods for representing gene regulatory networks.

Main Methods:

  • Literature review of systems biology applications in developmental biology.
  • Analysis of recent progress in modeling gene regulatory networks.
  • Focus on case studies related to cardiac development.

Main Results:

  • Systems biology offers a framework for understanding complex biological systems.
  • Progress has been made in modeling gene regulatory networks involved in heart development.
  • Challenges remain in developing comprehensive methods for network representation.

Conclusions:

  • Systems biology is crucial for unraveling the complexities of organismal development.
  • Further development of methods is needed to effectively represent gene regulatory networks.
  • Understanding these networks is vital for insights into development and disease.