This is comprised of the brain, spinal cord, and retina. The “command center” of the body. Building Blocks of the Nervous System The building block of the nervous system is the neuron. (Fun fact: The human brain contains approximately100 billion neurons. That’s more than 14x the number...
The majority of ganglia of the sympathetic system belong to a network ofsympathetic chain gangliathat runs alongside the vertebral column. The ganglia appear as a series of clusters of neurons linked by axonal bridges. There are typically 23 ganglia in the chain on either side of the spinal col...
andOXYGENtospinalcord duramater-outermostlayer;thickconnectivetissue arachnoid-thin,cobweblikelayerbetweenthetwomaters cerebrospinal-betweenthepiamater&arachnoid,fluid-shockabsorber Spinalcord:42-45cminlength,protectedbybone(vertebralcolumn),menings,andcerebrospinalfluid.THECEREBRUM Thelargestandmostprominentpartof...