Sejtfolyadék

Sejtfolyadék, also known as cytoplasm, is the jelly-like substance that fills a cell and surrounds its organelles. It is primarily composed of water, salts, and organic molecules. Within the cytoplasm, various metabolic reactions occur, including glycolysis and protein synthesis.

The cytoplasm serves several crucial functions within the cell. It provides a medium for the suspension and transport of organelles and molecules. It also plays a vital role in maintaining cell shape and structure, acting as a sort of internal skeleton. Furthermore, the cytoplasm is the site of many essential biochemical processes that are critical for cell survival and function.

The consistency of cytoplasm can vary, ranging from a gel-like state to a more fluid state, depending on the cell type and its metabolic activity. This dynamic nature allows for the movement of substances within the cell. The outer boundary of the cytoplasm is the cell membrane, which regulates the passage of materials into and out of the cell.

In prokaryotic cells, which lack a nucleus, the cytoplasm contains the cell's genetic material (nucleoid) and all its other components. In eukaryotic cells, the cytoplasm is everything outside the nucleus but within the cell membrane, encompassing the cytosol and the organelles suspended within it.