The other two meningeal layers are the arachnoid mater and the pia mater. The dura surrounds the brain and the spinal cord and is responsible for keeping in the cerebrospinal fluid.he other two meningeal layers are the arachnoid mater and the pia mater. The dura surrounds the brain and the spinal cord and is responsible for keeping in the cerebrospinal fluid.
For 50 years, the stairs carried fans of the five city sports teams to and from the Polo Grounds in Harlem, until they finally rusted away in the years following the stadiumâs demolition, in 1964. John T. Brush, who built the stairway and donated it to the city, died the year before it opened to the public.
Polo is a city in Caldwell County, Missouri, United States.The population was 575 at the 2010 census.s of the census of 2000, there were 582 people, 239 households, and 150 families residing in the city. The population density was 1,006.4 people per square mile (387.4/kmÂ²). There were 262 housing units at an average density of 453.0 per square mile (174.4/kmÂ²).