Question:

Explain the need for the level of organizations in multicellular organisms?

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level of organization= cells tissue organ and organ system

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  1. LEVEL 1 - Cells

    Are the basic unit of structure and function in living things.

    May serve a specific function within the organism

    Examples- blood cells, nerve cells, bone cells, etc.

    LEVEL 2 - Tissues

    Made up of cells that are similar in structure and function and which work together to perform a specific activity

    Examples - blood, nervous, bone, etc. Humans have 4 basic tissues: connective, epithelial, muscle, and nerve.

    LEVEL 3 - Organs

    Made up of tissues that work together to perform a specific activity

    Examples - heart, brain, skin, etc.



    LEVEL4 - Organ Systems

    Groups of two or more tissues that work together to perform a specific function for the organism.

    Examples - circulatory system, nervous system, skeletal system, etc.

    The Human body has 11 organ systems - circulatory, digestive, endocrine, excretory (urinary), immune(lymphatic), integumentary, muscular, nervous, reproductive, respiratory, and skeletal.  

    LEVEL 5 - Organisms

    Entire living things that can carry out all basic life processes. Meaning they can take in materials, release energy from food, release wastes, grow, respond to the environment, and reproduce.

    Usually made up of organ systems, but an organism may be made up of only one cell such as bacteria or protist.

    Examples - bacteria, amoeba, mushroom, sunflower, human


  2. orgasms are anything but organized.

  3. i like getting 2 points...

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