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.
Nostoc is a cyanobacteria that forms large spherical colonies. They are common and can just be seen with the naked eye. Most bacteria are only visible with the strongest lenses of the microscope. An easy way to collect them (and also many small protists) is by placing a cover slip on the surface of pond water.After a night whole colonies of bacteria will grow on the underside of the cover slip.ostoc is a cyanobacteria that forms large spherical colonies. They are common and can just be seen with the naked eye. Most bacteria are only visible with the strongest lenses of the microscope. An easy way to collect them (and also many small protists) is by placing a cover slip on the surface of pond water.