Nucleus
Name :- Nucleus (Nucleus was first described by Robert Brown in 1831, and it's material stained by the basic dyes was given the name chromatin by Flemming.) Properties : It is the largest cellular organelle. Generally located in the center of the cell but it may vary in some cells. It's diameter is about 10µ to 22µ. Mostly it is spherical in shape but it may vary in some cells. Nucleus occupies about 10% of total volume of the cell. It is present in all the cells in the body except RBCs. The cells with nucleus called eukaryotes and without nucleus called prokaryotes . Presence of nucleus is necessary for cell division. Most of the cells have only one nucleus called uninucleated cells. Few types of cells like skeletal muscle have many nuclei called multinucleated cells . Structure Of Nucleus : Nuclear membrane Major components like nucleoplasm, chromatin, chromosomes and nucleolus. 1. Nuclear Membrane (NM) : NM is double layered membrane called nuclear envelope, separates the
