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The electron shell closest to the nucleus is lettered
Neurons
Specialized cells in the nervous system that transmit information to other nerve cells, muscle, or gland cells through electrical and chemical signals.
Circulatory System
The body's system responsible for transporting blood, nutrients, gases, and wastes to and from cells, helps fight diseases and maintain homeostasis.
Exchanges Nutrients
The process by which cells, tissues, or organisms take in nutritional substances and expel waste products.
Blood Pressure
The force exerted by circulating blood on the walls of blood vessels.
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