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Chapter 16: Section 1 The World of Cells. Why are cells important ?. They help us do what we do Breakdown food Move Grow Reproduce. Cells have jobs. Some help move things around the organism Some fight disease. Bacteria . Smallest organisms on Earth Made of only one cell.
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Why are cells important? • They help us do what we do • Breakdown food • Move • Grow • Reproduce
Cells have jobs Some help move things around the organism Some fight disease
Bacteria • Smallest organisms on Earth • Made of only one cell
Larger Organisms • Made of many cells
What are cells made of? • A cell is like a bakery Many parts doing different jobs
Organelles • Each does a different job • In the bakery: • The workers
Cell membrane • Holds cell together • Is a boundary • Plants also have cell wall for support and protection In bakery: The walls
Cytoplasm • Like Jello/Where activities take place • In Bakery: • The kitchen
Nucleus Vacuoles Contains chromosomes (plan for cell) In Bakery: the manager stores food, waste In bakery: pantry, trash can
Mitochondria Where cellular respiration happens Food energy turned into energy cell can use In the bakery: oven
Photosynthesis Chloroplasts Makes food for cell Occurs in leaf cells Makes leaves green