Cell cardiac muscle function
Answers
#BAL
Cardiac muscle tissue, or myocardium, is a specialized type of muscle tissue that forms the heart. This muscle tissue, which contracts and releases involuntarily, is responsible for keeping the heart pumping blood around the body.
The human body contains three different kinds of muscle tissue: skeletal, smooth, and cardiac. Only cardiac muscle tissue, comprising cells called myocytes, is present in the heart.
In this article, we discuss the structure and function of cardiac muscle tissue. We also cover medical conditions that can affect cardiac muscle tissue and tips for keeping it healthy.
What is cardiac muscle tissue?
A person can strengthen cardiac muscle tissue by doing regular exercise.
Muscle is fibrous tissue that contracts to produce movement. There are three types of muscle tissue in the body: skeletal, smooth, and cardiac. Cardiac muscle is highly organized and contains many types of cell, including fibroblasts, smooth muscle cells, and cardiomyocytes.
Cardiac muscle only exists in the heart. It contains cardiac muscle cells, which perform highly coordinated actions that keep the heart pumping and blood circulating throughout the body.
Unlike skeletal muscle tissue, such as that which is present in the arms and legs, the movements that cardiac muscle tissue produces are involuntary. This means that they are automatic, and that a person cannot control them.
How does cardiac muscle tissue function?
The heart also contains specialized types of cardiac tissue containing "pacemaker" cells. These contract and expand in response to electrical impulses from the nervous system.
Pacemaker cells generate electrical impulses, or action potentials, that tell cardiac muscle cells to contract and relax. The pacemaker cells control heart rate and determine how fast the heart pumps blood.
How is it structured?
Cardiac muscle tissue gets its strength and flexibility from its interconnected cardiac muscle cells, or fibers.
Most cardiac muscle cells contain one nucleus, but some have two. The nucleus houses all of the cell's genetic material.
Cardiac muscle cells also contain mitochondria, which many people call "the powerhouses of the cells." These are organelles that convert oxygen and glucose into energy in the form of adenosine triphosphate (ATP).
Cardiac muscle cells appear striated or striped under a microscope. These stripes occur due to alternating filaments that comprise myosin and actin proteins. The dark stripes indicate thick filaments that comprise myosin proteins. The thin, lighter filaments contain actin.
When a cardiac muscle cell contracts, the myosin filament pulls the actin filaments toward each other, which causes the cell to shrink. The cell uses ATP to power this contraction.
A single myosin filament connects to two actin filaments on either side. This forms a single unit of muscle tissue, called a sarcomere.
Intercalated discs connect cardiac muscle cells. Gap junctions inside the intercalated discs relay electrical impulses from one cardiac muscle cell to another.
Desmosomes are other structures present within intercalated discs. These help hold cardiac muscle fibers together.
What conditions affect it
Difficulty breathing or shortness of breath may be a symptom of cardiomyopathy.
Cardiomyopathy refers to a group of medical conditions that affect cardiac muscle tissue and impair the heart's ability to pump blood or relax normally.
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
Explanation: