Vacuole
Cell organelle that stores materials such as water, salts, proteins, and carbohydrates
A vacuole is a membrane-bound organelle found in the cells of all living organisms. It is essentially a type of sac or vesicle that is used for storage of various substances such as water, ions, sugars, and enzymes.
In plant cells, the vacuole is the most prominent and largest organelle, occupying up to 90% of the cell’s volume. The vacuole in plant cells helps to maintain turgor pressure, which ensures rigidity and stability of the cell. The vacuoles store various substances, such as nutrients, waste products, and pigments. Some plant vacuoles also store toxins or compounds that deter herbivores.
In animal cells, vacuoles are relatively small and less common than in plant cells. They perform a variety of functions such as storing nutrients, water, and waste products. Animal cells have lysosomes, which are specialized vacuoles that contain digestive enzymes and break down cellular waste.
Vacuoles have semi-permeable membranes that allow the passage of some molecules while preventing others from crossing. The membranes of vacuoles are also important in osmoregulation, which is the process by which cells maintain a balance of water and ions.
Overall, vacuoles are essential organelles that provide a vital storage function in both plant and animal cells.
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