A nucleus is a compact sphere and is a very important organelle of eukaryotic cells. It is separate from the cell cytoplasm by an external boundary called a nuclear envelope. And the envelope is composed of two parallel membranes separated by a narrow space and is perforated with small, regularly spaced openings or pores.
Endoplasmic reticulum is used for transport and storage of two kinds of endoplasmic which is RER and SER. RER orginates from the outer membrane of the nuclear envelope and extends continuous network through the cytoplasm which allows to transport material. SER is a closed tubular network without ribosomes that functions in nutrient processing and in synthesis and storage of non protein macromolecules such as lipids.
Golgi Apparatus: A packaging Machine
is the site in the cell in which proteins are modified and then sent to their final destination. It is a discrete organelle consisting of stack of several flattened, disc-shaped sacs, or cisternae. These sacs have outer limiting membranes and cavities like those of the endoplasmic reticulum but they d0 not form a continuous network.
Nucleus, Enodoplasmic, Reticulum, and Golgi Apparautus: Natures assembly line
As the keeper of the eukaryotic genetic code, the nucleus ultimately governs and regulates all cell activities . This network includes ribosomes which originate in the nucleus, and the rough endoplasmic reticulum, which is continuously connected with the nuclear reticulum. The DNA containing the instructions for producing a protein is copied in to the RNA and passed out through the nuclear spores directly to the ribosomes on the endoplasmic reticuliculm. Golgi-endoplasmic reticulum.
Mitochondria:Energy Generators of the cell
Mitochondria appear as round or elongated particles scattered throughout the continuous outer membrane that forms the external contour, and an inner, folded membrane that forms nestled neatly within the membrane called cristae, may be tubular, like fingers, or folded into shelflike bands.
remarkable organelles found in algae and plant cells that are capable of converting the energy of sunlight into chemical energy through photosynthesis.
The cytoplasm of a eukaryotic cell is crisscrossed by a flexible framework of molecules called the cytoskeleton. This framework appears to have several functions, such as anchoring organelles, moving RNA and Vesicles, and permitting shape changes and movement in some cells.