- 1 Nuclear Cover
- Cover 2 nuclear components
- 3 nuclear pores in the nuclear envelope
- 4 References
The nuclear envelope envelope double-layered book cell components during most of their life cycle,  which is separating the cytoplasm and the components of the nucleus, and surrounds the nucleus of the cell that is an installation that contains genetic information of the cells, and controls cell growth and reproduction, and helps the nuclear shell to maintain the shape of the nucleus, also helps regulate the flow of particles from the nucleus and to it through the nuclear pores. 
Nuclear envelope components
The nuclear envelope double membrane structure, consists of a dual layer of internal and external phospholipids, and relates to the vacuum little between the two layers cavity network endoplasmic coarse, and is the outer layer of the nuclear shell extension of the outer surface of the network rer, and consists of the inner surface of the nuclear envelope of protein lining called nuclear plate (English name: nuclear lamina), which are connected Eromattin, and other components of the nucleus. 
Nuclear pores in the nuclear envelope
Regulates the nuclear shell particles pass between the nucleus and cytoplasm by allowing the passage of some molecules, preventing others,  which is fully perforated with many nuclear pores that allow full pass through small molecules that are up to the size of small proteins, but it is an obstacle optionally in front of the larger particles , each hole is surrounded by holes of these complex protein structure called a complex nuclear hole that chooses the molecules to enter the cell. 
Enters the nucleus through the nuclear pores all of the building blocks nucleotide Albanian molecules, RNA, and DNA, and adenosine tri-phosphate, which gives the necessary to assemble the genetic material of energy, and pass through each of histones, proteins and other large, which includes special sequences of amino acids on the surface that gives a signal acceptance by a complex nuclear hole, these compounds are regulated also export DNA Alraibouzay RNA, and subgroups of Alraibusomat. 
You can assemble the active cell mammary approximately 20,000 sub-unit of the ribosome per minute, and you need the kernel at certain points of the cell cycle to up to 30,000 histone per minute; So you need nuclear pores to be highly efficient to allow selective passage of the vast number of materials from the nucleus and to it in a timely fashion. 
- ^ أ ب ت Michael W. Davidson (13-11-2015)، "The Nuclear Envelope"، www.fsu.edu، Retrieved 4-12-2017. Edited.
- ↑ Regina Bailey (21-8-2017)، "The Cell Nucleus"، www.thoughtco.com، Retrieved 4-12-2017. Edited.
- ^ أ ب ت Bruce M. Alberts، L. Andrew Staehelin، John A. Cooper، and others (17-10-2017)، "Cell"، www.britannica.com، Retrieved 4-12-2017. Edited.
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