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 ...

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 ...

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 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.