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Structure of Cardiac Muscles

Structure of Cardiac Muscles

Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...

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Updated: Jul 11, 2025

Developing 3D Organized Human Cardiac Tissue within a Microfluidic Platform

Developing 3D Organized Human Cardiac Tissue within a Microfluidic Platform

Published on: June 15, 2021

Extracellular macrostructure anisotropy improves cardiac tissue-like construct function and phenotypic cellular

Jamie A Cyr¹, Maria Colzani², Semih Bayraktar²

¹Department of Materials Science & Metallurgy, Cambridge University, 27 Charles Babbage Road, Cambridge CB3 0FS, UK.

Biomaterials Advances

|November 9, 2023

Summary

This summary is machine-generated.

Engineered cardiac tissue scaffolds with aligned structures improve cell function and maturity. This research clarifies how scaffold macroarchitecture impacts engineered heart tissue for regenerative medicine.

Keywords:

Cardiac tissue engineering Collagen Freeze casting Ice-templating

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Last Updated: Jul 11, 2025

Developing 3D Organized Human Cardiac Tissue within a Microfluidic Platform

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Capillary Force Lithography for Cardiac Tissue Engineering

Capillary Force Lithography for Cardiac Tissue Engineering

Published on: June 10, 2014

Area of Science:

Biomaterials Science
Regenerative Medicine
Cardiovascular Research

Background:

Regenerative cardiac tissue holds therapeutic promise for myocardial repair, but poor electrical and contractile function hinders its clinical use.
Scaffolds mimicking native myocardium structure can enhance physiological function in engineered cardiac constructs.
Anisotropic extracellular architecture in engineered tissues improves contractility, signaling, and cellular organization compared to less ordered structures.

Purpose of the Study:

To isolate and assess the impact of scaffold macroarchitecture on engineered cardiac tissue function.
To understand how different scaffold designs influence cardiomyocyte behavior and tissue development.
To provide insights for designing optimized cardiac tissues for regenerative medicine and disease modeling.

Main Methods:

Fabrication of isotropic and aligned collagen scaffolds with conserved physio-mechanical properties.
Seeding scaffolds with human embryonic stem cell-derived cardiomyocytes (hESC-CMs).
Quantification of spatiotemporal tissue function via calcium signaling and contractile strain analysis, alongside examination of cellular organization and development.

Main Results:

Aligned tissue constructs exhibited enhanced signaling synchronicity and directional contractility.
Uniform cellular alignment was observed in tissues cultured on aligned scaffolds.
Cells within aligned constructs displayed markers of increased phenotypic and genetic maturity.

Conclusions:

Scaffold macroarchitecture significantly influences engineered cardiac tissue function, including electrical signaling and contractility.
Aligned collagen scaffolds promote improved cellular organization and maturation of hESC-CMs.
These findings are crucial for designing advanced cardiac tissues for regenerative therapies and in vitro models.