releasing energy for the cell Plant and animal cells Large central vacuole Contains a liquid called cell sap, which keeps the cell firm Plant cells only Cell wall Made of a tough substance called ...

and the lytic vacuoles of acidic pH, which are equivalent in function to lysosomes in mammalian cells (Figure 1). A special feature of guard cells is that they can increase or decrease their ...

Plant cells have several structures not found in other eukaryotes. In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls ...

Plant cells have a rigid cell structure. They are made up of a cell wall, cell membrane, cytoplasm, vacuole, nucleus, and chloroplasts. Plants feel firm because of their cellular walls.