Plasma (Cell) Membrane
The outer membrane of the cell, which regulates the transport of materials into and out of the cell.
A watery medium for the suspension of cell organelles and the circulation of soluble material throughout the cell. This also serves as the site for many of the cell's chemical reactions.
A spherical organelle, usually located near the center of the cell, that contains the cell's genetic information in the form of chromosomes. This allows the free transfer of that genetic information during synthesis and reproduction.
A small, dense organelle that serves as a site for the manufacture of protein molecules within the cell. This may be attached to the endoplasmic reticulum or may be floating free in the cytoplasm.
A small organelle that contains the enzymes necessary to allow the cell to perform certain aspects of chemical respiration.
A membrane-bound organelle containing water, enzymes and other substances. This may also serve to store food molecules, non removable wastes, or secretion products.
A small organelle, located within the nucleus, that functions in the cell's synthesis mechanism. It forms ribosomes involved in the manufacture of proteins.
A series of intracellular membranes that functions in the cell's synthesis mechanism. It houses ribosomes, accepts manufactured proteins, and transports these proteins to the plasma membrane for incorporation into the membrane or for secretion to the cell exterior.
A series of membrane-bound organelles that functions in the cell's synthesis mechanism. It accepts manufactured proteins and transports these proteins to the plasma membrane for incorporation into the membrane or for secretion to the cell exterior.
A specialized vacuole that aids nutrition by carrying digestive enzymes and by merging with food-containing vacuoles. The lysosome may also help to recycle aging or defective cells.
A cylindrical structure, found primarily in animal cells, that apparently functions in the process of cell division.
A chlorophyll containing structure, found primarily in plant and algae cells, in which the chemical reactions of photosynthesis occur.
A structure, found primarily in plants, that provides mechanical support and protection for the cell.