Individual Muscle Cells Contract. Round heads called cross-bridges stick out from the myosin at regular intervals. Muscle tissue has the ability to contract and shorten.
The interconnections allow the cardiac myofibrils to contract together in a fluid synchronized fashion to enable the heart to work as a pump. Each muscle is wrapped in a sheath of dense irregular connective tissue called the epimysium which allows a muscle to contract and move powerfully while maintaining its structural integrity. Muscle Cell Definition.
But heart muscle is.
When muscle cells break down glucose to generate ATP under oxygen deficient conditions. The interconnections allow the cardiac myofibrils to contract together in a fluid synchronized fashion to enable the heart to work as a pump. Most muscles in our bodies only act in response to incoming nerve signals which have to trigger each individual muscle cell to contract or relax. The epimysium also separates muscle from other tissues and organs in the area allowing the muscle to move independently.
