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Transcript
Looking Inside Cells Organelles • Organelles are the structures/parts of a cell and have a specific job Cell Wall • The rigid outer layer of nonliving material that surrounds plant cells is the cell wall. • Only found in plant cells. • Supports & protects Cell Membrane • Found in plant cells & animal cells • Very thin • Job – to control what comes in and what goes out. Cell Membrane Plant cell Animal cell Cytoplasm • A clear jelly like substance that keeps all of the organelles from bumping into one another… think of clear jello Cytoplasm The organelles are inside the cytoplasm. • Now, lets take a look at the organelles that are found inside cells. • You have to have a microscope because they are so small. Organelle: Nucleus • Nucleus – the control center. • The nucleus directs all activity in the cell. It also controls the growth and reproduction of the cell. • It is round. Nucleus Organelle: Mitochondria • The mitochondria makes the energy for the cell (like a power plant) … so it can dance • It is oblong shaped. Mitochondria Organelle: Ribosomes • Ribosomes act like little factories to produce protein. • They pass protein into the endoplasmic reticulum. Some are found floating in cytoplasm. Ribosomes Organelle: Endoplasmic Reticulum • The Endoplasmic Reticulum are maze passageways in the cytoplasm. • They carry proteins from one part of the cell to another. • This is very important for the cell to get its protein that it needs. This is like a conveyor belt. Endoplasmic Reticulum Found close to nucleus It carries proteins( which are made by the ribosomes)…the dots Organelle: Golgi Bodies • Golgi bodies act like a post office. They package stuff up and send it to other parts of the cell. Golgi Bodies Organelle: Vacuoles • Vaculoes are large storage buildings. • Because they help store food, the plant’s vacuole is much larger than the animal’s vacuole. Vacuole Organelle: Lysosomes • They are the clean-up crew. • They have chemicals in them that digest the wastes and other bad organelles. • When the cell dies the lysosmes work swiftly with their chemicals and digest the dead cell. • Without lysosomes living organisms would become filled with dead cells. Lysosomes Organelle: Chloroplast • Chloroplast is only found in plants. • It contains a green pigment called chlorophyll. • They are necessary for plants to make their own food. They capture the sunlight energy. Chloroplast Check out these music videos • • http://www.youtube.com/watch?v=zafJKbMPA8 • • http://www.youtube.com/watch?NR=1&v=r ABKB5aS2Zg