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.
(Bacillariophyta), a division of algae comprising about 20,000 species. Diatoms are microscopic (0.75-1500 microns), unicellular, and solitary or colonial algae.Among the colonial forms are species that live in slimy pipes, forming brown clusters that reach 20 cm in height. Diatom cells have hard siliceous shells (frustules) consisting of two overlapping halves or valves.Bacillariophyta), a division of algae comprising about 20,000 species. Diatoms are microscopic (0.75-1500 microns), unicellular, and solitary or colonial algae.