the nucleus of a cell is found in the nuclear envelope.
where is the nucleus of a cell found?
the nuclear envelope
the cell nucleus contains all of the cell's genome, except for a small fraction of mitochondrial dna, organized as multiple long linear dna molecules in a complex with a large variety of proteins, such as histones, to form chromosomes. the genes within these chromosomes are structured in such a way to promote cell function. the nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression—the nucleus is, therefore, the control center of the cell. the main structures making up the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle and isolates its contents from the cellular cytoplasm, and the nuclear matrix (which includes the nuclear lamina), a network within the nucleus that adds mechanical support, much like the cytoskeleton, which supports the cell as a whole.
cell nucleus
lymphocyte





























a lymphocyte is one of the subtypes of a white blood cell in a vertebrate's immune system. lymphocytes include natural killer cells (which function in cell-mediated, cytotoxic innate immunity), t cells (for cell-mediated, cytotoxic adaptive immunity), and b cells (for humoral, antibody-driven adaptive immunity). they are the main type of cell found in lymph, which prompted the name "lymphocyte".





























section::::types.





























the three major types of lymphocyte are t cells, b cells and natural killer (nk) cells. lymphocytes can be identified by their large nucleus.





























section::::types.:t cells and b cells.
lymphocyte