Examlex
What is the reason that cephalopods have a closed circulatory system?
Neutrons
Neutral, subatomic particles found in the nucleus of an atom, contributing to the atom's mass but not its charge.
Protons
Protons are positively charged subatomic particles found within the nucleus of an atom and contribute to the atom's overall charge and mass.
Orbiting
The act of one object moving around another in a path called an orbit, due to gravitational forces.
Nucleus
The membrane-bound organelle found in eukaryotic cells that contains most of the cell's genetic material.
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