What is the unique feature of cardiac muscle?

What is the 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.

What unique anatomical feature identifies cardiac muscle tissue?

Also unique to the cardiac muscle are intercalated discs that connect cardiac muscle cells to each other. Intercalated discs contain desmosomes and gap junctions, which perform important functions.

What are the anatomical and physiological characteristics 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 is the unique feature of cardiac muscle Class 11?

Feature of cardiac muscles are: (i) These are involuntry muscles which shows rhytmic contraction and relaxation throughout the life. (ii) These muscles are composed of non-trapring cells with faint cross striations. (iii) The cells of these muscles are cylindrical branched and uninucleated.

What role does the unique structure of cardiac muscle play in its function?

THE UNIQUE FEATURE IS THE INTERCALATED DISCS. THE INTERCALATED DISCS HAVE TWO IMPORTANT FUNCTIONS: 1. IT HOLDS THE MYOCYTES TOGETHER SO THAT THEY DO NOT PULL APART WHEN THE HEART CONTRACTS; 2. IS TO ALLOW AN ELECTRICAL CONNECTION BETWEEN THE CELLS, WHICH IS VITAL TO THE FUNCTION OF THE HEART AS A WHOLE.

What was one unique characteristic about cardiac muscle that was different from both of the other types of muscle tissue could you see this in the slide image?

Cardiac muscle is only found in the heart. Its fibers are longer than they are wide, and they are striated, like skeletal muscle fibers. But, unlike skeletal muscle fibers, cardiac muscle fibers have distinct ends to them, called intercalated discs. These are dark lines that run from one side of the fiber to the other.

What is special about tissue present in the heart?

The following are the special features of the tissue present in the heart: Muscles are striated and branched. They are auto-excitatory in nature, i.e. have their own mechanism to initiate contraction. Show a continuous cycle of systole and diastole throughout the life.

What is the anatomical makeup of cardiac muscles?

Cardiac muscles are composed of tubular cardiomyocytes, or cardiac muscle cells. The cardiomyocytes are composed of tubular myofibrils, which are repeating sections of sarcomeres. Intercalated disks transmit electrical action potentials between sarcomeres.

What are the features of cardiac muscle that differ from skeletal muscle?

Cardiac muscle differs from skeletal muscle in that it exhibits rhythmic contractions and is not under voluntary control. The rhythmic contraction of cardiac muscle is regulated by the sinoatrial node of the heart, which serves as the heart’s pacemaker.

What are the two unique features regarding muscles?

Excitability is the property in which the muscles work out on the process of contraction and relaxation as per the stimulation of cell. Contractility is the property in which the muscles work out on the contractility of the muscle cells that work on the stimulation of the input.

What unique properties of cardiac muscle are essential to its function?

Cardiac muscle cells contract without stimulation by the central nervous system (contraction is myogenic) Cardiac muscle cells are branched, allowing for faster signal propagation and contraction in three dimensions. Cardiac muscles cells are not fused together, but are connected by gap junctions at intercalated discs.

What distinguishes the structure of cardiac muscle from that of skeletal muscle?

What is the function of cardiac muscle?

Cardiac muscle is an involuntary muscle that is activated by an electrical conduction system. The function of the cardiac muscle is to pump oxygenated blood from the lungs into and throughout the body and pump deoxygenated blood from the body to the lungs, where it is exchanged for freshly oxygenated blood.

What muscles are in the heart?

Muscles Around the Heart. The name of the muscles around the heart are the pectorals. There are the pectoralis major, the pectoralis minors and the pecs. The pectoralis major muscles are the bulk of the muscles.

What is the medical term meaning cardiac muscle?

Cardiac muscle, also known as heart muscle, is the layer of muscle tissue which lies between the endocardium and epicardium. These inner and outer layers of the heart, respectively, surround the cardiac muscle tissue and separate it from the blood and other organs.

What is the structure of cardiac muscle tissue?

Cardiac muscle. Cardiac muscle tissue or myocardium forms the bulk of the heart. The heart wall is a three layered structure with a thick layer of myocardium sandwiched between the inner endocardium and the outer epicardium (also known as the visceral pericardium).