The brain is one of the largest and most complex organs in the human body. It is made up of more than 100 billion nerves that communicate in trillions of connections called synapses. The brain is made up of many specialized areas that work together: â¢ The cortex is the outermost layer of brain cells. Thinking and voluntary movements begin in the cortex. â¢ The brain stem is between the spinal cord and the rest of the brain. Basic functions like breathing and sleep are controlled here.
Knoxville is an unincorporated community in Frederick County, Maryland, United States. The Robert Clagett Farm and Magnolia Plantation are listed on the National Register of Historic Places.
Knoxville (in Frederick County, MD) Populated Place Profile. Knoxville (GNIS FID: 585333) is a populated place located within the District 12, Petersville, a minor civil division (MCD) of Frederick County. The elevation of Knoxville is 282 feet. Knoxville appears on the Harpers Ferry U.S. Geological Survey Map. Frederick County is in the Eastern Time Zone (UTC -5 hours).