Describe the roles of the tissue in the voluntary, involuntary and cardiac muscle imovement, Organ movement locomotion , an internal circulation?
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Answer:
Cardiac muscle tissue works to keep your heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control.
It does this through specialized cells called pacemaker cells. These control the contractions of your heart. Your nervous system sends signals to pacemaker cells that prompt them to either speed up or slow down your heart rate.
Your pacemaker cells are connected to other cardiac muscle cells, allowing them to pass along signals. This results in a wave of contractions of your cardiac muscle, which creates your heartbeat. Learn more about how your heart works.
What does cardiac muscle tissue look like when it moves?
Use this interactive 3-D diagram to explore the movement of cardiac muscle tissue.
What are heart muscles made of?
Intercalated discs
Intercalated discs are small connections that join cardiac muscle cells (cardiomyocytes) to each other.
Gap junctions
Gap junctions are part of the intercalated discs. When one cardiac muscle cell is stimulated to contract, a gap junction transfers the stimulation to the next cardiac cell. This allows the muscle to contract in a coordinated way.
Desmosomes
Like gap junctions, desmosomes are also found within intercalated discs. They help hold the cardiac muscle fibers together during a contraction.
Nucleus
The nucleus is the “control center” of a cell. It contains all of the cell’s genetic material. While skeletal muscle cells can have multiple nuclei, cardiac muscle cells typically only have one nucleus.
What is cardiomyopathy?
Cardiomyopathy is one of the main conditions that can affect your cardiac muscle tissue. It’s a disease that makes it harder for your heart to pump blood.
There are several different types of cardiomyopathy:
Hypertrophic cardiomyopathy. The cardiac muscles enlarge and thicken for no apparent reason. It’s usually found in the lower chambers of the heart, called the ventricles.
Dilated cardiomyopathy. The ventricles become larger and weaker. This makes it hard for them to pump, which makes the rest of your heart work harder to pump blood.
Restrictive cardiomyopathy. The ventricles become stiff, which prevents them from filling to their full volume.
Arrhythmogenic right ventricular dysplasia. The cardiac muscle tissue of your right ventricle is replaced with fatty or fiber-rich tissue. This can lead to arrhythmia, which refers to an abnormal heart rate or rhythm.
Not all cases of cardiomyopathy produce symptoms. However, it can sometimes cause:
trouble breathing, especially when exercising
fatigue
swollen ankles, feet, legs, abdomen, or neck veins
It’s usually hard to pinpoint the cause of cardiomyopathy. But several things can increase your risk of developing it, including:
a family history of cardiomyopathy or heart failure
high blood pressure
obesity
heavy alcohol consumption
use of certain recreational drugs
past heart attacks or heart infections
How does exercise impact cardiac muscle tissue?
As with many other muscles in your body, exercise can strengthen your cardiac muscle. Exercise can also help reduce your risk of developing cardiomyopathy and make your heart work more efficiently.
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