The Latin name is from the Japanese name for T. sieboldii. T. canadensis and T. heterophylla were discovered early (before 1800) and until 1855 were simply treated as species of Pinus, but in 1842 T. sieboldii, the southern Japanese hemlock, was described as Abies tsugae.
The brains of the cell, the nucleus directs cell activities and contains genetic material called chromosomes made of DNA.
The central digestive system of a cell is called the lysosome. The lysosome is the organelle within a cell that serves as its  digestion center. In the centre of a cell there is a nucleus which controls the cell, acting as a brain. The lysosome is the digestive center in animal cells. The Nucleus.