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Related Concept Videos

Anatomy of the Heart01:27

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.
Structure of Cardiac Muscles01:13

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...
Specialized Characteristics of Cardiac Muscles01:27

Specialized Characteristics of Cardiac Muscles

The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy reserves in...
Structure and Organization of Smooth Muscles01:13

Structure and Organization of Smooth Muscles

Smooth muscle tissue is a type of muscle tissue that can be found lining various vital organs in the human body, including the lungs, blood vessels, digestive tract, and respiratory tract. This type of tissue is responsible for regulating the movements of these organs, playing crucial roles in the functioning of various systems, including the vascular, digestive, respiratory, and urinary systems.
Structure of smooth muscle cell
Smooth muscle cells are spindle-shaped with tapering ends and a...
Layers of the Heart Wall01:15

Layers of the Heart Wall

The heart wall comprises three distinct layers: the epicardium, myocardium, and endocardium. The outermost layer, the epicardium, is the visceral layer of the serous pericardium, featuring a thin, transparent mesothelial surface and an inner layer of areolar connective tissue with fat deposits that increase with age.
The myocardium, the thickest layer, consists of cardiac muscle cells interconnected by intercalated discs and crisscrossing connective tissue fibers. These muscle fibers contract...
Anatomy of the Heart01:20

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: Jun 25, 2026

Mitochondrial Isolation from Skeletal Muscle
09:45

Mitochondrial Isolation from Skeletal Muscle

Published on: March 30, 2011

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Robust Mitochondrial Isolation from Rodent Cardiac Tissue.

Alyssa C Vadovsky1, Melissa Quinn2, Tianyi Xia1

  • 1Department of Physiology, Michigan State University.

Journal of Visualized Experiments : Jove
|September 9, 2024
PubMed
Summary
This summary is machine-generated.

This protocol provides a robust method for isolating high-quality mitochondria from various tissues. It ensures consistent mitochondrial function, crucial for studying metabolic diseases and bioenergetics.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cellular Physiology

Background:

  • Mitochondrial isolation is essential for studying metabolic impairments and diseases.
  • Consistent mitochondrial quality is critical for accurate physiological and bioenergetic research.
  • Numerous isolation methods exist, but basic principles remain similar.

Purpose of the Study:

  • To detail a robust protocol for isolating well-coupled mitochondria.
  • To enable extraction from diverse tissue sources, including small animals and cells.
  • To provide quality control metrics for assessing mitochondrial integrity.

Main Methods:

  • Organ dissection and mitochondrial purification.
  • Protein quantification and quality control checks.
  • Assessment of respiratory control ratio (RCR) as a primary quality metric.

Main Results:

  • The protocol consistently yields high-quality, well-coupled mitochondria.
  • Isolated mitochondria exhibit above-average RCR values across various tissue sources.
  • The method is robust and adaptable for different research needs.

Conclusions:

  • This protocol offers a reliable approach for mitochondrial isolation.
  • High RCR values indicate preserved mitochondrial function and integrity.
  • The method supports advanced research in mitochondrial physiology and disease.