to be honest im not for sure because you don't have any answer choices
Quite simple really.... The CNS actually doesn't receive as much nutrients or key components from the blood... The blood actually dumps it into the Cerebrospinal fluid. The Cerebrospinal fluid therefore is directly in contact with the brain and if you want to find an infection you take from a source as close to thing as you can.
C) The condenser
Condenser is used to collect and focus the light from the illuminator on to the specimen.
<em>paper is better</em> because its made of natural materials and the earth can absorb and decompose it.<em><u> Plastic is worse</u></em> because can get caught around animals necks and can be eaten which will cause stomach issues and later death.