In 1850, the Swiss scientist A.V. Kolliker noticed tiny organelles in insect muscle cells and named them sarcosomes. He is called the discoverer of mitochondria. In 1882 W. Fleming observed filamentous mitochondria and named them Fila. In 1890, Altman named it Bioplast. Mitochondria was named by Carl Benda in 1898. In 1904, Frederick Mavis was the first to observe mitochondria in the plant cell Nymphaea alba. In 1957 scientist Philip Siekevitz coined the term Power House of the cell. Modern scientists call mitochondria semi-autonomous cells. They also called it electrosome. Mitochondria are also known as chondriosomes and plasmosomes. Mitochondria of birds’ flight muscles are called sarcosomes.