What exactly is a heart attack? Most heart attacks happen when a clot in the coronary artery blocks the supply of blood and oxygen to the heart. Often this leads to an irregular heartbeat-called an arrhythmia-that causes a severe decrease in the pumping function of the heart.
Oncocytoma can be described as a tumor that is mainly constituted out of oncocytes. These are actually epithelial cells, containing excessive quantities of mitochondria. This excess leads to a cytoplasm that is acidophilic and granular.
Noun. 1. choanocyte-any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body. collar cell. flagellated cell-any cell or one-celled organism equipped with a flagellum. 1  Facebook.