The difference between the structure of cardiac muscle and skeletal muscle?

Answer 1

One key difference between cardiac and skeletal muscles is that skeletal muscles are controlled by the nervous system, while cardiac muscles move involuntarily. In addition, cardiac muscles are only found in the heart, while skeletal muscles are found throughout the entire body.

Answer 2

Cardiac muscle, called the myocardium, is composed of a number of long, branching cells that are joined by intercalated discs. An intercalated disc is an area where cell membranes of adjacent cardiac muscle cells are joined. There are also small spaces in cardiac muscle cells that create a direct electrical connection between cells by allowing ions to move freely between cells. The interconnecting matrix joins cardiac muscle cells into a single, very large muscle cell called a syncytium (Latin for "joined cells"). Another difference between skeletal muscle and cardiac muscle is that cardiac muscle has pacemaker cells, which initiate contractions rhythmically rather than through neural stimulation. Cardiac muscle contraction lasts about 10 times longer than skeletal muscle contractions, and cardiac muscle cannot produce sustained contractions as skeletal muscles do

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Answer 3

Cardiac muscles structure look like fibers connected together to form a tight webbing. The skeletal muscle structure looks different by having spindles of long striated fibers bunched together into a thicker rod.

Answer 4

comparing to skeletal muscles, cardiac muscle:

longer t tubules

intercalated disks

smaller and shorter