What is the microscopic anatomical make-up of cardiac muscles?

Cardiac muscles are make-up of cardiac muscle cells.

Explanation:

Cardiac muscle cells are a type of tubular cardiomyocytes, which make the cardiac muscles. The tissue of cardiac muscles found only in heart. the cardiac muscle appears striated due to the organization of muscle tissues. The myofibril make the composition of cardiomyocytes.  There is presence of Sarcomere in the muscle tissue.  The activity of myofibril is required for the contraction of muscle on the molecular level.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.

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