Four characteristics define cardiac muscle tissue cells: they are involuntary and intrinsically controlled, striated, branched, and single nucleated . Cardiac muscle is considered to be an involuntary tissue because it is controlled unconsciously by regions of the brain stem and hypothalamus.
What is the main features of cardiac muscle?
Cardiac muscle is striated muscle that is present only in the heart. Cardiac muscle fibers have a single nucleus, are branched, and joined to one another by intercalated discs that contain gap junctions for depolarization between cells and desmosomes to hold the fibers together when the heart contracts.
What are the three features of cardiac muscle?
- Heart, which pumps blood throughout the body, is made up of cardiac muscles. Three features of cardiac muscle are:
- (i) Cardiac muscles are involuntary. ...
- (ii) Cardiac muscle cells are cylindrical, branched and uninucleate.
- (iii) Cardiac muscles show rhythmic contraction and relaxation throughout the life.
What are the features of cardiac muscle Class 9?
- Cardiac muscles are involuntary muscles. They are involved in continuous rhythmic contraction and relaxation.
- Cardiomyocytes or the cardiac cells are uninucleate, cylindrical, and elongated.
- Cardiac muscles display faint cross-striations which do not get fatigued under normal circumstances.
What is cardiac muscle?
Cardiac muscle is an involuntary striated muscle tissue found only in the heart and is responsible for the ability of the heart to pump blood.
What is the structure of cardiac muscle?
Cardiac muscle cells form a highly branched cellular network in the heart . They are connected end to end by intercalated disks and are organized into layers of myocardial tissue that are wrapped around the chambers of the heart.
What are intercalated discs Class 9?
Intercalated discs are specialised regions of cell membrane of two adjacent fibres . The intercalated dics function as a booster of contraction wave and permit the wave of muscle contraction to be transmitted from one cardiac fibre to other. They ar epresent in cardiax muscle fibres as bands.
What is cardiac muscle and its function?
Cardiac muscle tissue is a specialized, organized type of tissue that only exists in the heart. It is responsible for keeping the heart pumping and blood circulating around the body . Cardiac muscle tissue, or myocardium, contains cells that expand and contract in response to electrical impulses from the nervous system.
What is the structure and function of cardiac muscle?
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.
What are the four properties of cardiac muscle?
Four characteristics define cardiac muscle tissue cells: they are involuntary and intrinsically controlled, striated, branched, and single nucleated .
Where is the cardiac muscle found?
Cardiac muscle cells are located in the walls of the heart , appear striated, and are under involuntary control. Smooth muscle fibers are located in walls of hollow visceral organs, except the heart, appear spindle-shaped, and are also under involuntary control.
Which one of the following is unique feature of cardiac muscle?
Unique to the cardiac muscle are a branching morphology and the presence of intercalated discs found between muscle fibers . The intercalated discs stain darkly and are oriented at right angles to the muscle fibers. They are often seen as zigzagging bands cutting across the muscle fibers.
Is the heart a muscle?
Blood carries oxygen and other important nutrients that all body organs need to stay healthy and to work properly. Your heart is a muscle , and its job is to pump blood throughout your circulatory system.
What’s the function of intercalated discs?
muscle cells, unique junctions called intercalated discs (gap junctions) link the cells together and define their borders. Intercalated discs are the major portal for cardiac cell-to-cell communication, which is required for coordinated muscle contraction and maintenance of circulation .
Which cells contain Sarcoplasm?
Sarcoplasm is the cytoplasm of a muscle cell . It is comparable to the cytoplasm of other cells, but it contains unusually large amounts of glycogen (a polymer of glucose), myoglobin, a red-colored protein necessary for binding oxygen molecules that diffuse into muscle fibers, and mitochondria.
What type of muscle has intercalated discs?
Cardiac muscle has branching fibers, one nucleus per cell, striations, and intercalated disks.
