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Nervous vs Endocrine systems compared brain and spinal cord next to hormone glands, contrasting electrical impulses with chemical signals, key, brain, nerves, thyroid. Doodle style diagram
Neuron that is the main part of the nervous system with description
Neural network. circuit or connections of the biological neurons. nervous system. Communication structure of neurons. Transmission of signal in the human brain. Vector illustration
Futuristic vector interface elements with bright ring indicators. Energy, impulses and stylish user interface design in sci-fi colors.
Conducting System of the Heart - Medical Vector Illustration

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