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cell. organ. Organ system. organism. tissue. neuron. liver. Endocrine system. elephant. tendon. Control center. sensors. target. Communication system. sensors. Communication system. Communication system. 5. 4. 1. 3. 2. Positive feedback encourages the change.
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cell organ Organ system organism tissue neuron liver Endocrine system elephant tendon
Control center sensors target Communication system sensors Communication system Communication system
5 4 1 3 2
Positive feedback encourages the change Negative feedback reverses the change negative negative positive negative positive positive negative
epithelial muscle nervous connective Protective, covering cells Transmits and receives impulses Support, bind, protect other tissue Cells able to stretch & contract Skin, stomach lining Tendons, ligaments, bone, cartilage Skeletal, cardiac, smooth muscle Brain & spinal cord