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| The enclosure around the cell controls molecules that are allowed to leave and enter the cell. |
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| Cell walls are much thicker and more rigid than cell membranes and are made mostly of a tough material called cellulose. They provide support for the cell. |
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| where photosynthesis happens |
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| the jelly-like thing that fills the inside of a cell. |
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| The endoplasmic reticulum is a folded membrane that forms a system of canals within the cytoplasm. Materials are transported through these canals to different parts of the cell, or to the outside of the cell. |
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| To transport the proteins that are synthesized in the ER. |
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| Inside the mitochondria, tiny food particles are broken down to release their chemical energy for the cell’s activities. |
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| A large, dark, round nucleus is often the most easily seen structure in a cell. The nucleus controls the cells’ activities. |
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| structures made of genetic material that directs a cell’s growth and reproduction. The cell nucleus is enclosed by a nuclear membrane |
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| which controls what enters and leaves the nucleus. |
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| Balloonlike spaces within the cytoplasm are storage places for surplus food, wastes, and other substances that the cell cannot use right away. These structures, called vacuoles, are surrounded by a membrane. |
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