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Of the following particles, the only one that is not stable outside an atom is the
Arteries
Blood vessels that carry oxygenated blood away from the heart to the body's tissues.
Aortic Arch
The curved portion of the aorta, the major artery coming from the heart, from which the main arteries of the head, neck, and upper limbs arise.
Brachiocephalic Trunk
A major artery in the upper body that supplies blood to the right arm, head, and neck.
Left Subclavian Artery
A major artery that supplies blood to the left arm, neck, and head, originating from the aortic arch.
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