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 region between the nucleus and the cell membrane: Organelles: Tiny cell structures that carry out specific functions within the cell: Mitochondria: The powerhouses of the cell because they produce most of the energy for the cell. Lysomes: These small cell organelles contain chemicals that function to break down food particles and worn out cell parts: Ribosomes