which of these characteristics best describe cardiac muscle tissue?
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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.
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['Excitability- can be stimulated by chemical signals, nerves and stretch.', 'Conductivity- the signal for a muscle to contract is spread from the point of stimulation throughout the entire muscle.', 'Contractility- ability of the muscle to shorten.', 'Extensibility- ... ', 'Elasticity-']
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Four characteristics define skeletal muscle tissue cells: they are voluntary, striated, not branched, and multinucleated.
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Connective tissues come in a vast variety of forms, yet they typically have in common three characteristic components: cells, large amounts of amorphous ground substance, and protein fibers.
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The human heart is a four-chambered muscular organ, shaped and sized roughly like a man's closed fist with two-thirds of the mass to the left of midline. The heart is enclosed in a pericardial sac that is lined with the parietal layers of a serous membrane.
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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.
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The wall of the heart consists of three layers: the epicardium (external layer), the myocardium (middle layer) and the endocardium (inner layer). The epicardium is the thin, transparent outer layer of the wall and is composed of delicate connective tissue.
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Muscle tissue is characterized by properties that allow movement. Muscle cells are excitable; they respond to a stimulus. They are contractile, meaning they can shorten and generate a pulling force. When attached between two movable objects, such as two bones, contraction of the muscles cause the bones to move.
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What is a unique characteristic of connective tissue? It has a lot of extracellular matrix and relatively few cells compared to most tissues.
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Your heart is made up of three layers of tissue: Pericardium – a thin outer lining that protects and surrounds your heart. Myocardium – a thick muscular middle layer that contracts and squeezes blood out of your heart. Endocardium – a thin inner lining.
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Cardiac muscle, composed of the contractile cells of the heart, has a striated appearance due to alternating thick and thin filaments composed of myosin and actin. Actin and myosin are contractile protein filaments, with actin making up thin filaments, and myosin contributing to thick filaments.
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Structure. There are two types of cells within the heart: the cardiomyocytes and the cardiac pacemaker cells.
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The branched nature of cells and gap junctions allows rapid propagation of action potentials across the entire myocardium; this enables the heart to contract and relax as a single unit (functional syncytium). Unlike the skeletal muscle, the cardiac muscle is controlled by the autonomic nervous system.
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The 3 types of muscle tissue are cardiac, smooth, and skeletal. Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control. ... Skeletal muscle fibers occur in muscles which are attached to the skeleton. They are striated in appearance and are under voluntary control.
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The 3 types of muscle tissue are cardiac, smooth, and skeletal. Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control.
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['Connective tissue ranges from avascular to highly vascular.', 'Composition: Composed mainly of nonliving extracellular matrix that separates the cells of the tissue.', 'Location: It is present in between different tissue and organs. It can be found in and around the body organs.']
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The Heart Is a Muscle Your heart is really a muscle. It's located a little to the left of the middle of your chest, and it's about the size of your fist. There are lots of muscles all over your body — in your arms, in your legs, in your back, even in your behind. But the heart muscle is special because of what it does.