The term lacquer is used for a number of hard and potentially shiny finishes applied to materials such as wood. These fall into a number of very different groups.
Cardiac Muscle Tissue. Cardiac muscle tissue is an extremely specialized form of muscle tissue that has evolved to pump blood throughout the body. In fact, cardiac muscle is only found in the heart and makes up the bulk of the heartâs mass. The heart beats powerfully and continuously throughout an entire lifetime without any rest, so cardiac muscle has evolved to have incredibly high contractile strength and endurance.
The heart is a muscular pump that delivers blood to the organs, including itself. It is largely composed of specialized muscle fibers called myocytes as well as blood vessels, connective tissues and nerves. In order to coordinate contraction, the nerves and myocytes communicate with an electrical charge.