It is the largest organelle in the cell and it contains the DNA of the cell. DNA (Deoxyribonucleic Acid) contains all the information for cells to live, perform their functions and reproduce. Inside the nucleus is another organelle called the nucleolus. The nucleolus is responsible for making ribosomes.
Blood cells..these cells include RBC' ,WBC thormbocytes etc.they are always motile and never stay in one place. They have limited life span and they never multiply to form new cells.instead new cells are formed from other cells.
