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The Evidence for Evolution02:55

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Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
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Cardiac Output
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Right Heart Catheterization: An OverviewRight heart catheterization is an invasive diagnostic procedure that measures right-sided cardiac and pulmonary artery pressures, calculates cardiac output, and identifies intracardiac shunts. It provides detailed hemodynamic data essential for diagnosing and managing various cardiovascular conditions, such as pulmonary hypertension.Access SitesCommon access sites for right heart catheterization include the internal jugular vein in the neck region, the...
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Cardiac Spheroids as in vitro Bioengineered Heart Tissues to Study Human Heart Pathophysiology
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Cardiac septation in heart development and evolution.

Wataru Katano1, Yuuta Moriyama2, Jun K Takeuchi3

  • 1Faculty of Life Sciences, Department of Applied Biosciences, Toyo University, Ora-gun, Japan.

Development, Growth & Differentiation
|December 15, 2018
PubMed
Summary
This summary is machine-generated.

Vertebrates evolved complex circulatory systems, including septated hearts, to adapt to terrestrial life and oxygen intake from lungs. This review explores how environmental changes shaped these vital cardiovascular adaptations.

Keywords:
cardiac septationdevelopmentevolutionheartrespiratory organ

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Area of Science:

  • Cardiovascular Physiology
  • Evolutionary Biology
  • Comparative Anatomy

Background:

  • The heart is a vital organ essential for blood circulation from early development.
  • Vertebrates have evolved from aquatic to terrestrial environments, necessitating adaptations in their circulatory systems.
  • The development of lungs as a sophisticated respiratory organ accompanied changes in heart morphology.

Purpose of the Study:

  • To review the evolutionary changes in vertebrate circulatory systems in response to environmental shifts.
  • To explore the link between adaptation to terrestrial life and the development of pulmonary circulation.
  • To understand the coordination of heart and lung development for efficient oxygen uptake and energy production.

Main Methods:

  • Comparative analysis of circulatory system structures across different vertebrate groups.
  • Review of evolutionary developmental biology principles applied to heart and lung evolution.
  • Synthesis of existing literature on vertebrate adaptation to terrestrial environments.

Main Results:

  • Terrestrial adaptation led to the evolution of pulmonary circulation and a fully septated (four-chambered) heart.
  • Complete separation of venous and arterial blood was achieved, enhancing oxygen delivery.
  • Heart and lung development became coordinated to meet the metabolic demands of terrestrial life.

Conclusions:

  • Environmental pressures, particularly the transition to land, drove significant modifications in vertebrate heart structure and function.
  • The evolution of the four-chambered heart and pulmonary circulation represents a key adaptation for efficient oxygen utilization in terrestrial vertebrates.
  • Understanding these evolutionary changes provides insights into cardiovascular adaptation and physiological resilience.