7 2 Eukaryotic Cell Structure CELL ORGANIZATION 1

7. 2 Eukaryotic Cell Structure

CELL ORGANIZATION 1. Cell (Plasma membrane) o Provides shape and flexibility o Semi-permeable o Maintains Homeostasis

2. Cytoplasm o Jellylike material o Contains water, salts, and other chemicals o Suspends organelles and site for different chemical reactions

3. Nucleus o where DNA and RNA are made o DNA directs cell activities. o The brain of the cell

4. Nucleolus o Located in the nucleus o Responsible for making ribosomes 5. Chromatin o Located in the nucleus o The long strands of DNA

6. Endoplasmic Reticulum o Membrane system of folded sacs and tunnels o Moves material around the cell o Rough E. R – Covered with ribosomes, protein synthesis o Smooth E. R – no ribosomes

7. Ribosomes o Helps the cell make its own protein 8. Golgi Bodies o Stacks of membrane-covered sacs o Sorts, packages, and sends proteins outside the cell

9. Mitochondria o Provides energy for the cell o Has its own DNA o The power plant of the cell

10. Lysosome o Small and spherical structures o Contains digestive enzymes that digest food particles, bacteria, and worn out or broken cell parts

11. Cell Wall o Found in plants cells o Very rigid structure that surrounds the cell membrane o Helps support and protect the cell

12. Chloroplast o In plants cells o Captures light energy and produces food for the plant o Contains green pigment called chlorophyll

13. Vacuoles o Temporary storage areas in cells o Stores food, enzymes, and waste products

Cell Parts- Support and Locomotion 1. Cytoskeleton a. Microtubules b. Microfilaments 2. Cilia & Flagella