Examlex
The density of the Universe comes from baryonic matter, non-baryonic dark matter, and dark energy. What percentage of the density of the Universe do each of the three represent?
Brain
The central organ of the human nervous system, responsible for processing sensory information, regulating bodily functions, and facilitating cognition.
Spinal Cord
A long, thin, tubular structure made up of nervous tissue, which extends from the brainstem down the back, and transmits nerve impulses between the brain and the rest of the body.
Common Ancestor
Forebear of two or more lineages or family groups; ancestral to both groups.
Nervous Systems
The complex network of nerve cells and fibers that transmits nerve impulses between parts of the body, coordinating actions and sensory information.
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