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Notes: Levels of Organization

This educational content explores the 5 levels of biological organization, from cells to organisms. Learn about cells, tissues, organs, organ systems, and organisms in both humans and plants, including their structures and functions. Discover the diversity of life forms, from unicellular organisms like prokaryotes and eukaryotes to complex multicellular organisms. Gain insight into the hierarchy of life and how different levels work together to sustain life processes.

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Notes: Levels of Organization

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  1. Notes: Levels of Organization

  2. 5 Levels of Organization: • Cell (bone cell) • Tissues (connective tissue) • Organs (rib) • Organ Systems (skeletal system) • Organism (human)

  3. Cells • Basic unit of life • Make up all living things

  4. Tissues • Group of similar cells working together to perform a particular function

  5. Types of Human Tissue • Connective – structure and support (bones) • Epithelial – skin and lining of major organs • Muscle – movement (biceps) • Nervous – carries messages to and from the brain (nerves)

  6. Types of Plant Tissue Dermal – protection and reduce water loss Vascular – transport water and nutrients Ground – storage and support and where photosynthesis takes place

  7. Organs • Group of tissues working together to perform a specific function • Ex. – heart, brain, skin, leaf, stem, flower

  8. Organ Systems • Group of organs working together to perform a specific function. • Allow organisms to grow, reproduce, and maintain life.

  9. Human Organ Systems: • skeletal, muscular, respiratory, digestive, urinary, circulatory, immune, nervous, reproductive.

  10. Plant Organ Systems: Shoot System – leaves, stems, and flowers Root System – anchors plant and takes in water and nutrients

  11. Organism • Entire living things that can carry out all basic life processes. • Made up of organ systems (some are single celled)

  12. Unicellular Organisms: Do all the things needed for their survival within one single cell Prokaryotes – do not have a membrane bound nucleus Eukaryotes – have a membrane bound nucleus Examples – amoeba and algae

  13. Multicellular Organisms: Made of many eukaryotic cells working together to perform all of life’s processes Examples – mushroom, sunflower, human

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