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Anatomy of the Heart

Anatomy of the Heart

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.

Anatomy of the Heart

Anatomy of the Heart

The heart is a hollow, muscular organ approximately the size of a fist, consisting of four chambers. It is enclosed in the pericardium, a fibrous sac with two layers: the visceral and parietal pericardium, separated by a fluid-filled space containing serous fluid to reduce friction.
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...

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Related Experiment Video

Updated: Jul 10, 2026

Pipeline for Multi-Scale Three-Dimensional Anatomic Study of the Human Heart

Pipeline for Multi-Scale Three-Dimensional Anatomic Study of the Human Heart

Published on: June 28, 2024

A three dimensional heart model based on anatomically aligned trusses.

S Witman¹, A Gefen, O Barnea

¹Department of Biomedical Engineering, Tel Aviv University.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|November 16, 2007

Summary

This summary is machine-generated.

This study introduces a novel computational model simulating heart contractions using anatomical data and matrix structural analysis. The model accurately represents cardiac muscle, collagen, and blood, offering insights into cardiac mechanics.

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Area of Science:

Computational Biology
Biomedical Engineering
Cardiovascular Physiology

Background:

Accurate modeling of cardiac mechanics is crucial for understanding heart function and disease.
Existing models often simplify the complex interplay of cardiac muscle, passive tissues, and blood dynamics.
Incorporating anatomical fiber orientation is essential for realistic simulation of myocardial contraction.

Purpose of the Study:

To develop and present a new computational approach for modeling and simulating heart contraction.
To integrate anatomical data, cardiac muscle fiber orientation, and the mechanical properties of key cardiac components.
To simulate the electrical activation and its effect on mechanical contraction within the heart model.

Main Methods:

Modeling the heart as a truss structure using matrix structural analysis to represent myofiber groups.
Incorporating three key elements: contractile cardiac muscle, passive collagen, and intracardiac blood, while preserving incompressibility.
Simulating the cardiac conduction system by signal transfer between elements and Purkinje fiber activation.

Main Results:

Demonstrated the model's capability using a 3D one-layer ventricle.
Validated the simulation with both orthogonal and anatomically oriented fiber configurations.
The model successfully accounts for cardiac muscle fibers, their orientation, and the interaction of cardiac components.

Conclusions:

The presented truss-based model offers a robust framework for simulating cardiac contraction.
This approach enhances the anatomical and physiological realism of cardiac modeling.
The method provides a valuable tool for investigating cardiac mechanics and electrophysiology.