nuclear membrane
The DNA.
nucleolus
the nucleolus is inside your nucleus which is also inside of the nuclear membrane, which protects the nucleus of any other 'not needed' organelles to come inside of the nucleus.
Nucleolus
The nucleolus.
Bones
the nucleus
nucleus
PENIS
Inside the nucleus is DNA which takes the form of a double helix. There is also a region of the nucleus called the nucleolus where ribosomes are made.
In Biology the nucleus of a cell is the control centre, inside the nucleus is DNA which gives it the structure and knowledge to be what it is.
Your Skull, Rib Cage and Skin.