Function:
The nucleus is the control center of the cell. It contains the DNA and RNA of the cell, which work together to build and control the cell. It produces proteins, which are carried by the endoplasmic reticulum to the variousparts of the cell. These proteins are messages which give the cell orders.
Like the mitochondria and organelles, the nucleus' proteins and DNA direct the rest of the cell.
The membrane surrounding the nucleus is called the nuclear [Nucleus: detail]membrane. The "stuff" inside of the nucleus (besides the nucleolus) is called the nucleoplasm. Inside of the nucleus is is a roundshape called the nucleoulus. Made up of protiens and RNA, the nucleolus helps in the formation of ribosomes.
Location:
In the cytoplasm, connected to the endoplasmic reticulum.