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Organization within the Human Body
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Cells Smallest unit of structure & function Have specialized functions
Examples Nerve cells (neurons) Blood cells Bone cells
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Tissues Group of similar cells working together to carry out the same function 4 basic types of tissue in the human body Nerve tissue Muscle tissue Epithelial tissue Connective tissue
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Nerve Tissue Carry impulses back & forth to the brain from the body
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Muscle Tissue Contracts and shortens making body parts move “movement”
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Epithelial Tissue Covers the surface of the body inside & outside
As lining or covering of internal organs Outside As layer of skin
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Connective Tissue Connects all parts of the body and provides support
Examples Tendons Ligaments Cartilage
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Tendon
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Ligament
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Cartilage
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Organs Two or more types of similar tissues working together to perform the same function Example Heart made of muscle & connective tissues which work together (function) to pump blood throughout the body.
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Systems Two or more organs working together to perform a specific function. 11 different organ systems in the body Circulatory Digestive Endocrine Excretory (Urinary) Immune Integumentary (Skin) Muscular Nervous Reproductive Respiratory Skelatal
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CELLS TISSUES ORGANS SYSTEMS
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