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Cardiac muscle, also known as myocardium or heart muscle, is one of three types of muscle tissue found in the body. It is an involuntary, striated muscle that makes up the thick middle layer of the heart wall. The primary function of cardiac muscle is to contract and relax, pumping blood through the cardiovascular system.
| Characteristics | Values |
|---|---|
| Type of tissue | Muscle |
| Involuntary or voluntary | Involuntary |
| Striated or not | Striated |
| Location | Middle layer of the heart |
| Blood supply | Coronary circulation |
| Composition | Individual cardiac muscle cells joined by intercalated discs, encased by collagen fibres and other substances that form the extracellular matrix |
| Contraction | Similar to skeletal muscle but with some differences |
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What You'll Learn
- Cardiac muscle is one of three types of vertebrate muscle tissues
- It makes up the thick middle layer of the heart
- It is involuntary and contracts to pump blood through the cardiovascular system
- It is composed of individual cardiac muscle cells called cardiomyocytes
- It is surrounded by a thin outer layer called the epicardium
Cardiac muscle is one of three types of vertebrate muscle tissues
Cardiac muscle (also called heart muscle or myocardium) is one of three types of vertebrate muscle tissues, the others being skeletal muscle and smooth muscle. It is an involuntary, striated muscle that constitutes the main tissue of the wall of the heart. The cardiac muscle forms a thick middle layer between the outer layer of the heart wall (the pericardium) or epicardium and the inner layer (the endocardium), with blood supplied via the coronary circulation. It is composed of individual cardiac muscle cells (cardiomyocytes) joined by intercalated discs, and encased by collagen fibres and other substances that form the extracellular matrix.
Cardiac muscle contracts and relaxes in a similar manner to skeletal muscle, although with some important differences. Cardiac muscle contracts and releases involuntarily, keeping the heart pumping blood around the body. This is one feature that differentiates it from skeletal muscle tissue, which you can control. The primary function of cardiomyocytes is to contract, which generates the pressure needed to pump blood through the circulatory system. Rapid, involuntary contraction and relaxation of the cardiac muscle are vital for pumping blood throughout the cardiovascular system.
Cardiac muscle tissue works to keep the heart pumping through involuntary movements. This is controlled by specialised cells called pacemaker cells, which control the contractions of the heart. The nervous system sends signals to pacemaker cells that prompt them to either speed up or slow down the heart rate. Pacemaker cells are connected to other cardiac muscle cells, allowing them to pass along signals. This results in a wave of contractions of the cardiac muscle, which creates the heartbeat.
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It makes up the thick middle layer of the heart
Cardiac muscle (also called myocardium) makes up the thick middle layer of the heart. It is one of three types of muscle in the body, the others being skeletal and smooth muscle. The myocardium is surrounded by a thin outer layer called the epicardium (or visceral pericardium) and an inner endocardium.
The cardiac muscle is composed of individual cardiac muscle cells (or cardiomyocytes) joined by intercalated discs, and encased by collagen fibres and other substances that form the extracellular matrix. The primary function of cardiomyocytes is to contract, which generates the pressure needed to pump blood through the circulatory system. Cardiac muscle contracts in a similar manner to skeletal muscle, although with some important differences. For example, cardiac muscle tissue works to keep the heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control.
The rapid, involuntary contraction and relaxation of the cardiac muscle are vital for pumping blood throughout the cardiovascular system. This is controlled by specialised cells called pacemaker cells, which receive signals from the nervous system to prompt the heart to speed up or slow down.
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It is involuntary and contracts to pump blood through the cardiovascular system
Cardiac muscle, also known as myocardium, is one of three types of vertebrate muscle tissues, the others being skeletal muscle and smooth muscle. It is an involuntary, striated muscle that makes up the thick middle layer of the heart wall. The myocardium is surrounded by a thin outer layer called the epicardium (or visceral pericardium) and an inner endocardium.
The primary function of cardiac muscle is to contract and relax to pump blood through the cardiovascular system. This is achieved through specialised cells called pacemaker cells, which control the contractions of the heart. The nervous system sends signals to these pacemaker cells, prompting them to speed up or slow down the heart rate. The pacemaker cells are connected to other cardiac muscle cells, allowing them to pass along signals and create a wave of contractions that result in a heartbeat.
Cardiac muscle contracts in a similar manner to skeletal muscle, but with some important differences. For example, cardiac muscle contracts involuntarily, meaning it beats on its own without any conscious input. This involuntary movement is essential for maintaining the continuous pumping of blood through the cardiovascular system.
The coronary circulation supplies blood to the cardiac muscle, and cardiac veins drain this blood. Cardiomyocytes are the individual cells that make up the cardiac muscle, and their primary function is to contract and generate the pressure needed to pump blood effectively.
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It is composed of individual cardiac muscle cells called cardiomyocytes
Cardiac muscle, also known as myocardium, is one of three types of vertebrate muscle tissues, the others being skeletal muscle and smooth muscle. It is an involuntary, striated muscle that makes up the thick middle layer of the heart wall. The cardiac muscle is composed of individual cardiac muscle cells called cardiomyocytes, which are joined by intercalated discs and encased by collagen fibres and other substances that form the extracellular matrix. The primary function of cardiomyocytes is to contract, which generates the pressure needed to pump blood through the circulatory system. These contractions occur rapidly and involuntarily, causing the cardiac muscle to squeeze and relax, pumping blood through the cardiovascular system.
Cardiac muscle is unique in that it is the only type of muscle tissue in the body that contracts and relaxes involuntarily. This involuntary movement is controlled by specialised cells called pacemaker cells, which receive signals from the nervous system to regulate heart rate. Pacemaker cells are connected to other cardiac muscle cells, allowing them to pass along signals and create a wave of contractions that result in a heartbeat.
The coronary circulation supplies blood to the cardiac muscle, and cardiac veins drain this blood. The cardiac muscle is surrounded by a thin outer layer called the epicardium (or visceral pericardium) and an inner endocardium.
Cardiac muscle tissue plays a vital role in maintaining cardiovascular health and ensuring the efficient circulation of blood throughout the body. Its involuntary contractions and relaxations are essential for pumping blood and maintaining adequate blood pressure.
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It is surrounded by a thin outer layer called the epicardium
Cardiac muscle, also known as myocardium, is one of three types of muscle tissues in the body. The other two are skeletal muscle and smooth muscle. Cardiac muscle makes up the thick middle layer of the heart, and is surrounded by a thin outer layer called the epicardium (or visceral pericardium) and an inner endocardium.
The primary function of cardiac muscle is to contract and relax, which generates the pressure needed to pump blood through the circulatory system. This is achieved through specialised cells called pacemaker cells, which control the contractions of the heart. The nervous system sends signals to these pacemaker cells, prompting them to either speed up or slow down the heart rate. These pacemaker cells are connected to other cardiac muscle cells, allowing them to pass along signals and create a wave of contractions that result in a heartbeat.
The coronary arteries supply blood to the cardiac muscle, and cardiac veins drain this blood. Cardiomyocytes are the individual cells that make up the cardiac muscle. They contract and release involuntarily, keeping the heart pumping blood around the body.
Cardiac muscle is an involuntary, striated muscle that constitutes the main tissue of the wall of the heart. It is composed of individual cardiac muscle cells joined by intercalated discs, and encased by collagen fibres and other substances that form the extracellular matrix.
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Frequently asked questions
Cardiac muscle (or myocardium) is one of three types of vertebrate muscle tissues, the others being skeletal muscle and smooth muscle.
Cardiac muscle contracts and relaxes to pump blood through your cardiovascular system.
Cardiac muscle makes up the thick middle layer of the heart. It doesn't exist anywhere else in the body.
Cardiac muscle works through involuntary movements. It is controlled by specialised cells called pacemaker cells, which receive signals from the nervous system to prompt the heart to speed up or slow down.
Cardiac muscle is an involuntary, striated muscle. It is composed of individual cardiac muscle cells (cardiomyocytes) joined by intercalated discs and encased by collagen fibres and other substances that form the extracellular matrix.
