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Cell Structure

Cell Structure. Nucleolus. This is where ribosomes are synthesized. They are a tangle of chromatin. Not membrane bound. Nucleus. Contains the chromosomes. Surrounded by a selectively permiable membrane that contains pores. . Endoplasmic reticulum.

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Cell Structure

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  1. Cell Structure

  2. Nucleolus • This is where ribosomes are synthesized. • They are a tangle of chromatin. Not membrane bound.

  3. Nucleus • Contains the chromosomes. • Surrounded by a selectively permiablemembrane that contains pores.

  4. Endoplasmic reticulum • Flattened sacs that traverse the cytoplasm. • Two types: • Rough E.R.- site of protein synthesis from the attached ribosomes. • Smooth E.R.- • Assists in the synthesis of steroid hormones and other lipids • Connect R.E.R to golgi. • Carries out detoxification processes.

  5. Ribosomes • The site of protein synthesis. • Either in cytoplasm or attached to endoplasmic reticulm.

  6. Golgi Apparatus • Near the nucleus, it is flattened membranous sacs surrounded by vesicles. • They package substances from R.E.R and secrete them to other parts or cell surface for export.

  7. Mitochondria • The site of cellular respiration. • All cells have them, very active cells have up to 2,500. • Have an outer double membrane called cristae. • Called the powerhouse of the cell. • Have own DNA.

  8. Lysosome • Sacs of digestive enzymes. • They are the main intracellular digestor. • They are breaking down and recycling cell parts.

  9. Proteins • Complex Macromolecules that carry out many functions. • Examples: • Growth and repair • Signaling • Defense • Catalyzing chemical reactions.

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