Ribosomes are sites for protein building.
Mitochondria release energy from simple sugars to power the cell (respiration).
Chloroplasts are green organelles that capture light energy to make food (photosynthesis).
A storage unit filled with fluid, called a vacuole, forms the central part of each cell.
Cytoplasm is a jellylike substance that fills much of the space inside the cell. This is where chemical reactions occur.
The nucleus is the cell's control center. It stores the cell's genes encoded in molecules of DNA.
A thin cell membrane inside the cell wall controls which substances enter and leave the cell.
A rigid cell wall made of a substance called cellulose surrounds the cell membrane and supports the cell.
