Explain the structure and specfic function of cardiac muscle
Answers
Answer:
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 heart also contains specialized types of cardiac tissue containing “pacemaker” cells. These contract and expand in response to electrical impulses from the nervous system.
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
Explanation:
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Answer:
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 heart also contains specialized types of cardiac tissue containing “pacemaker” cells.
These contract and expand in response to electrical impulses from the nervous system.
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 fibres together
Explanation: