Oral thrush is a yeast infection in the mouth caused by a fungus. It can cause a burning sensation on the tongue as well as sore white plaques that can be scraped off (although it may sometimes appear as a red patch).
Cardiac muscle is a type of involuntary striated muscle found in the walls and histological foundation of the heart, specifically the myocardium. Cardiac muscle is one of three major types of muscle, the others being skeletal and smooth muscle.
Cardiac muscle is a syncytium in which the cardiac muscle cells are so tightly bound that when one of these cells is excited the action potential spreads to all of them and allows succinct coordinated contraction of the heart.