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7 th Grade 3/12 Do Now:

7 th Grade 3/12 Do Now:. Finish Cell Theory TimeLine. Cell Theory:. Hooke – first person to discover and name cells Schleiden – discovers plants are made of cells Schwann – discovers animals are made of cells Virchow – discovers cells come from other cells. Cell Theory.

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7 th Grade 3/12 Do Now:

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  1. 7th Grade3/12 Do Now: Finish Cell Theory TimeLine

  2. Cell Theory: • Hooke – first person to discover and name cells • Schleiden – discovers plants are made of cells • Schwann – discovers animals are made of cells • Virchow – discovers cells come from other cells

  3. Cell Theory • How does Cell Theory answer these questions: • What makes something alive? • What do cells do? • Where do cells come from?

  4. THE CELL

  5. COMMON CELL TRAITS • A cell is the smallest unit that is capable of performing life functions.

  6. COMPARING CELLS • The size & shape of a cell relates to its function. (job it does)

  7. Prokaryotic Cells(proh KAYR ee yah tihk) • cells without membrane-bound structures • EX: bacteria pond scum

  8. 7th Grade3/13 Do Now • Color and label the picture of the animal cell and plant cell for the following parts of the cell: • Cell membrane – orange • Cytoplasm – sky (light) blue • Cell wall – yellow green

  9. Eukaryotic Cells(yew KAYR ee yah tihk) • cells with membrane-bound structures • EX: animals, plants, fungi and protists

  10. CELL WALL • protects the cell • gives shape • is made of cellulose • A cell wall is found in plants, algae, fungi, & most bacteria.

  11. CELL MEMBRANE • Outer covering, protective layer around ALL cells • For cells with cell walls,the cell membrane is inside the cell wall • Allows food, oxygen, & water into the cell & waste products out of the cell.

  12. CYTOPLASM • gelatin-like inside cell membrane • constantly flows • aka protoplasm

  13. CYTOSKELETON • scaffolding-like structure in cytoplasm • helps the cell maintain or change its shape • made of protein

  14. Organelle Foldable Take a piece of paper and fold it lengthwise (hot dog). At the top label: Cell Organelles On the same side cut the paper into 7 flaps (approximately 4 lines) Label the 7 flaps: ribosome, chloroplast, mitochondria, endoplasmic reticulum, golgi bodies, vacuole and lysosome. On the inside, define and draw the organelle.

  15. Organelle Foldable Take a piece of paper and fold it lengthwise (hot dog). At the top label: Cell Organelles On the same side cut the paper into 7 flaps (approximately 4 lines) Label the 7 flaps: ribosome, chloroplast, mitochondria, endoplasmic reticulum, golgi bodies, vacuole and lysosome. On the inside, define and draw the organelle.

  16. NUCLEUS • Directs all cell activities • Contains instructions for everything the cell does • These instructions are found on a hereditary material called DNA • Usually the largest organelle

  17. NUCLEAR MEMBRANE • separates nucleus from cytoplasm • controls movement of materials in & out of nucleus

  18. NUCLEOLUS • Aka “little nucleus” • Found in the nucleus

  19. CHROMATIN • contains genetic code that controls cell • made of DNA & proteins

  20. NUCLEUS • Directs all cell activities • Contains instructions for everything the cell does • These instructions are found on a hereditary material called DNA • Usually the largest organelle

  21. NUCLEAR MEMBRANE • separates nucleus from cytoplasm • controls movement of materials in & out of nucleus

  22. NUCLEOLUS • Aka “little nucleus” • Found in the nucleus

  23. CHROMATIN • contains genetic code that controls cell • made of DNA & proteins

  24. ENDOPLASMIC RETICULUM • A series of folded membranes that move materials (proteins) around in a cell • like a conveyor belt • Smooth ER – ribosomes not attached to ER • Rough ER – ribosomes attached to ER

  25. RIBOSOMES • Make proteins • Float freely or attached to the endoplasmic reticulum (ER) • Ribosomes are made in the nucleolus

  26. GOLGI BODIES (GAWL jee) • Stacked flattened membranes • Sort and package proteins

  27. VACUOLES • Temporary storage spaces • Store food, water, waste

  28. LYSOSOMES (LI suh sohmz) • The word "lysosome" is Latin for "kill body." • The purpose of the lysosome is to digest things. They might be used to digest food or break down the cell when it dies. • Break down food molecules, cell wastes & worn out cell parts

  29. CHLOROPLASTS • Green organelles that make food • found only in plant cells

  30. CHLOROPHYLL • A green pigment that gives leaves & stems their color • Captures sunlight energy that is used to produce food called glucose • Glucose is a type of sugar

  31. MITOCHONDRIA • Organelles that release energy from food • This energy is released by breaking down food into carbon dioxide • AKA the powerhouse b/c they release energy from food • Some muscle cells have 20,000 mitochondria

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