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Homeostasis
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The process by which the body's internal environment is kept stable in spite of changes in the external environment
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Energy
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What human beings need to do work
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Cell
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The building block of living things
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Tissue
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Group of similar cells that perform the same function
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Organ
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Group of different tissues that have a specific job
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Organ system
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Group of organs that work together to perform a specific job
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Muscle, connective, nerve and epithelial
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What are the four types of tissues in the human body?
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Muscle
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Which one of the four types of human tissue has the ability to contract, or shorten?
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Connective tissue
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Provides support for the body and connects all its parts
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Nerve tissues
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Carries messages back and forth between the brain and the spinal cord and every other part of the body
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Epithelial tissue
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Forms a protective surface on the outside of the body and lines its internal cavities
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Connective tissue
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Which type of tissue is blood?
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The heart
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This organ is made up of all four kinds of tissues
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Cells, tissues, organs, organ systems
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From smallest to largest, the levels of organization in a multicellular living thing are:
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An ameba
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This is an example of a unicellular living thing.
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